NavList threads from 2021

[Back to overview of years]

26 Dec 2020 – 01 Jan 2021 : Christmas week Quizzes

1. 2020-12-26 10:35 David Pike
2. 2020-12-26 14:23 Jim Vrancik
3. 2020-12-26 16:40 Greg Rudzinski
4. 2020-12-26 21:32 Herman Dekker
5. 2020-12-27 12:12 David Pike
6. 2020-12-27 15:16 Greg Rudzinski
7. 2020-12-27 17:14 Modris Fersters
8. 2020-12-27 17:43 David Pike
9. 2020-12-27 17:57 David Pike
10. 2020-12-28 02:18 Mike Burkes
11. 2020-12-28 11:39 David Pike
12. 2020-12-28 14:47 Jim Vrancik
13. 2020-12-28 21:22 Greg Rudzinski
14. 2020-12-29 11:56 Modris Fersters
15. 2020-12-29 12:25 David Pike
16. 2020-12-29 12:42 David Pike
17. 2020-12-30 10:05 David Pike
18. 2020-12-31 10:54 David Pike
19. 2020-12-31 15:42 Don Seltzer
20. 2021-01-01 09:26 David Pike
21. 2021-01-01 20:58 Adrian F

02 Jan 2021 – 02 Jan 2021 : NavList message volume

1. 2021-01-02 00:00 Frank Reed

02 Jan 2021 – 02 Jan 2021 : Re: Christmas week Quizzes - Where's my bike + Final Comments

1. 2021-01-02 10:47 David Pike

02 Jan 2021 – 03 Jan 2021 : Perihelion coming up in a few minutes

1. 2021-01-02 13:31 Dave Walden
2. 2021-01-02 14:47 Dave Walden
3. 2021-01-02 15:07 Frank Reed
4. 2021-01-02 23:57 Dave Walden
5. 2021-01-03 00:13 Gary LaPook

02 Jan 2021 – 03 Jan 2021 : Catch Australia while you can

1. 2021-01-02 09:01 Gary LaPook
2. 2021-01-02 21:58 David C
3. 2021-01-03 00:38 Gary LaPook

02 Jan 2021 – 03 Jan 2021 : Re: Christmas week Quizzes - Suggested solution to the external tangents to three circles problem

1. 2021-01-02 09:07 David Pike
2. 2021-01-03 12:34 David Pike

01 Jan 2021 – 03 Jan 2021 : Online Meeting / Office Hours today

1. 2021-01-01 15:16 Frank Reed
2. 2021-01-01 16:33 Frank Reed
3. 2021-01-03 17:00 Frank Reed

04 Jan 2021 – 04 Jan 2021 : Reconditioning Sextants

1. 2021-01-04 04:11 Robert Swartz

02 Jan 2021 – 04 Jan 2021 : Re: Christmas week Quizzes - Answer to Muffins Question

1. 2021-01-02 09:34 David Pike
2. 2021-01-04 10:45 Bill Ritchie
3. 2021-01-04 16:20 David Pike

04 Jan 2021 – 04 Jan 2021 : Royal Observatory workshop

1. 2021-01-04 17:12 Frank Reed
2. 2021-01-04 21:25 Michael Bradley

05 Jan 2021 – 06 Jan 2021 : Negative leap second?

1. 2021-01-05 19:55 Gary LaPook
2. 2021-01-05 20:29 Frank Reed
3. 2021-01-05 22:16 Sean C
4. 2021-01-06 07:39 David Iwancio
5. 2021-01-06 14:25 Richard B. Langley
6. 2021-01-06 19:14 David Iwancio

07 Jan 2021 – 07 Jan 2021 : Computing Lunar Comparing Distances by "Plane Sailing"

1. 2021-01-07 12:18 David Iwancio

07 Jan 2021 – 07 Jan 2021 : RIN Submarine Navigation and Ocean Sailing webinars are now on YouTube.

1. 2021-01-07 15:02 David Pike

27 Dec 2020 – 07 Jan 2021 : Obscure Nautical Almanac star

1. 2020-12-27 22:44 Frank Reed
2. 2020-12-28 17:36 Robert H. van Gent
3. 2020-12-28 17:59 Frank Reed
4. 2020-12-28 18:13 Frank Reed
5. 2020-12-29 11:44 Robert H. van Gent
6. 2020-12-29 16:27 Frank Reed
7. 2020-12-29 16:55 Robert H. van Gent
8. 2020-12-29 21:01 John Clements
9. 2020-12-30 01:02 Frank Reed
10. 2021-01-01 13:54 Robin Stuart
11. 2021-01-01 15:09 Frank Reed
12. 2021-01-01 19:53 Robin Stuart
13. 2021-01-02 15:41 Frank Reed
14. 2021-01-02 20:01 Robin Stuart
15. 2021-01-03 04:29 Frank Reed
16. 2021-01-03 07:14 Sean C
17. 2021-01-03 13:01 Robert H. van Gent
18. 2021-01-03 18:27 Frank Reed
19. 2021-01-03 18:43 Frank Reed
20. 2021-01-03 19:16 Frank Reed
21. 2021-01-04 09:29 Sean C
22. 2021-01-07 05:23 Frank Reed
23. 2021-01-07 15:24 Charles McElhill

07 Jan 2021 – 08 Jan 2021 : Bridge sextants

1. 2021-01-07 22:47 Frank Reed
2. 2021-01-08 00:06 Murray Buckman
3. 2021-01-08 00:26 Murray Buckman

07 Jan 2021 – 08 Jan 2021 : Re: Lifeboat sextant instruction booklet

1. 2021-01-07 18:54 Alan S
2. 2021-01-08 04:01 Alan S

09 Jan 2021 – 10 Jan 2021 : Willmann-Bell closed?

1. 2021-01-09 21:54 John Clements
2. 2021-01-09 23:26 Wayne Hilliard
3. 2021-01-09 23:39 Frank Reed
4. 2021-01-10 01:03 Frank Reed
5. 2021-01-10 02:43 David Iwancio
6. 2021-01-10 10:29 Bela Kovacs
7. 2021-01-10 12:53 Andy Howse

07 Jan 2021 – 10 Jan 2021 : An Evening with Map Projections - Free Webinar

1. 2021-01-07 15:08 David Pike
2. 2021-01-10 18:51 Frank Reed
3. 2021-01-10 19:19 Sean C

10 Jan 2021 – 10 Jan 2021 : Afternoon Sight

1. 2021-01-10 03:10 David C
2. 2021-01-10 09:31 David Pike
3. 2021-01-10 21:12 David C

10 Jan 2021 – 11 Jan 2021 : Own sextant - always better

1. 2021-01-10 22:14 Igor S.
2. 2021-01-10 22:56 Rommel John Miller
3. 2021-01-11 02:39 Greg Rudzinski

12 Jan 2021 – 12 Jan 2021 : Solar Eclipses in high latitudes

1. 2021-01-12 09:43 Bob Crawley

12 Jan 2021 – 13 Jan 2021 : Moon Phases 2021 Including Libration and Position Angle

1. 2021-01-12 18:54 Ed Popko
2. 2021-01-13 02:07 Frank Reed

13 Jan 2021 – 13 Jan 2021 : Digital Sextant

1. 2021-01-13 15:56 Sung Cho
2. 2021-01-13 15:58 Frank Reed
3. 2021-01-13 16:26 Frank Reed
4. 2021-01-13 17:19 Ken Gebhart

13 Jan 2021 – 13 Jan 2021 : Winter celestial navigation workshops

1. 2021-01-13 21:21 Frank Reed

14 Jan 2021 – 14 Jan 2021 : Reflecting Circle

1. 2021-01-14 20:51 Bill Ritchie

13 Jan 2021 – 14 Jan 2021 : Introduction

1. 2021-01-13 18:58 Richard Toohey
2. 2021-01-13 19:35 Alexandre Eremenko
3. 2021-01-13 20:39 Richard Toohey
4. 2021-01-13 23:23 Hewitt Schlereth
5. 2021-01-14 00:37 Robert VanderPol II
6. 2021-01-14 00:53 Richard Toohey
7. 2021-01-14 00:57 Richard Toohey
8. 2021-01-14 07:07 R William McAllister
9. 2021-01-14 13:18 Robert VanderPol II
10. 2021-01-14 15:54 R William McAllister
11. 2021-01-14 23:27 Richard Toohey

14 Jan 2021 – 14 Jan 2021 : Re: Patrick O'Brian characters discuss time and longitude

1. 2021-01-14 23:44 Jim Sergovic

13 Jan 2021 – 14 Jan 2021 : Old Sextant - Charles Hutchinson

1. 2021-01-13 23:48 Carl Main
2. 2021-01-14 00:44 Robert VanderPol II
3. 2021-01-14 01:07 Alan S
4. 2021-01-14 02:37 David C
5. 2021-01-14 08:52 Bill Lionheart
6. 2021-01-14 15:40 John Rizzuto
7. 2021-01-14 16:34 Frank Reed
8. 2021-01-14 16:49 Carl Main
9. 2021-01-14 16:51 Carl Main
10. 2021-01-14 16:52 Carl Main
11. 2021-01-14 16:55 Carl Main
12. 2021-01-14 17:07 Carl Main
13. 2021-01-14 21:32 Frank Reed
14. 2021-01-14 23:46 Carl Main

15 Jan 2021 – 15 Jan 2021 : Re: Introduction and set of HO 214

1. 2021-01-15 15:21 Bob Peterson
2. 2021-01-15 18:50 Hewitt Schlereth

14 Jan 2021 – 15 Jan 2021 : Re: Traditional navigation by slide rule

1. 2021-01-14 01:21 Alan S
2. 2021-01-15 16:56 Francis Upchurch
3. 2021-01-15 23:27 Sean C

15 Jan 2021 – 15 Jan 2021 : Free Downloadable Electronic Navigation Guide

1. 2021-01-15 21:11 David Pike
2. 2021-01-15 23:27 Alan S

16 Jan 2021 – 16 Jan 2021 : RE. Kollsman MA2 Sextant

1. 2021-01-16 06:08 Robert Swartz

16 Jan 2021 – 16 Jan 2021 : Kollsman Sextants' Nomenclature

1. 2021-01-16 06:28 Robert Swartz

16 Jan 2021 – 16 Jan 2021 : Kollsman D1 Periscopic Sextant with mount

1. 2021-01-16 06:39 Robert Swartz

16 Jan 2021 – 16 Jan 2021 : The Past, Present and Future of Nautical Information for Leisure Sailors

1. 2021-01-16 18:35 David Pike

12 Jan 2021 – 16 Jan 2021 : Sun's SD to 0.01' (-ish) from Nautical Almanac

1. 2021-01-12 11:57 David Iwancio
2. 2021-01-12 17:06 Frank Reed
3. 2021-01-12 17:50 Herman Dekker
4. 2021-01-13 21:21 David Iwancio
5. 2021-01-14 01:48 Richard Toohey
6. 2021-01-15 04:03 David Iwancio
7. 2021-01-16 11:33 Richard Toohey
8. 2021-01-16 18:36 Frank Reed

14 Jan 2021 – 16 Jan 2021 : Aeronautical Periscopic Bubble Sextant

1. 2021-01-14 22:41 Cam Brien
2. 2021-01-16 06:33 Gary LaPook
3. 2021-01-16 19:52 Cam Brien
4. 2021-01-16 19:59 Frank Reed

16 Jan 2021 – 16 Jan 2021 : Space station sextant returned to Earth

1. 2021-01-16 22:03 Paul Hirose

08 Jan 2021 – 17 Jan 2021 : Online meeting today

1. 2021-01-08 15:40 Frank Reed
2. 2021-01-10 20:30 Frank Reed
3. 2021-01-15 19:42 Frank Reed
4. 2021-01-17 17:17 Frank Reed

16 Jan 2021 – 17 Jan 2021 : Azimuth computation formula in Pub. 229

1. 2021-01-16 22:20 Rafael C. Caruso
2. 2021-01-17 03:03 David C
3. 2021-01-17 03:09 David C
4. 2021-01-17 03:52 David C
5. 2021-01-17 11:11 Lars Bergman
6. 2021-01-17 17:35 Rafael C. Caruso
7. 2021-01-17 17:35 Rafael C. Caruso

17 Jan 2021 – 18 Jan 2021 : Navigation star names

1. 2021-01-17 04:13 Frank Reed
2. 2021-01-18 04:25 Frank Reed

18 Jan 2021 – 18 Jan 2021 : Circular slide rule type device

1. 2021-01-18 04:18 Alan S
2. 2021-01-18 08:56 Ronald van Riet
3. 2021-01-18 22:44 Dave Walden

18 Jan 2021 – 19 Jan 2021 : Thomas Sumner & Probus (656 tons)

1. 2021-01-18 18:09 Bruce J. Pennino
2. 2021-01-18 19:19 Frank Reed
3. 2021-01-18 21:11 Hewitt Schlereth
4. 2021-01-19 17:08 Dave Walden

19 Jan 2021 – 19 Jan 2021 : Flat Bygrave

1. 2021-01-19 04:16 Alan S
2. 2021-01-19 20:09 Gary LaPook
3. 2021-01-19 22:05 Alan S

19 Jan 2021 – 20 Jan 2021 : Your Earth is too cloudy

1. 2021-01-19 18:09 Frank Reed
2. 2021-01-19 23:41 Jim Rives
3. 2021-01-20 03:18 Frank Reed

20 Jan 2021 – 20 Jan 2021 : M. Low USN MKIII MOD-0 - Illumination issue

1. 2021-01-20 22:55 John Rizzuto

21 Jan 2021 – 21 Jan 2021 : Jan Huygen van Linschoten

1. 2021-01-21 19:11 Bob Goethe

21 Jan 2021 – 22 Jan 2021 : Soviet star globe with Latin inscriptions

1. 2021-01-21 15:16 Tony Oz
2. 2021-01-21 15:40 Frank Reed
3. 2021-01-21 18:15 Dave Walden
4. 2021-01-21 18:16 Tony Oz
5. 2021-01-22 07:48 Sean C

22 Jan 2021 – 22 Jan 2021 : Online meeting Friday 2000 UT

1. 2021-01-22 02:14 Frank Reed
2. 2021-01-22 18:04 Frank Reed

21 Jan 2021 – 23 Jan 2021 : Question about LoP's and Intercepts on a Mercator Chart

1. 2021-01-21 06:23 David Iwancio
2. 2021-01-21 15:34 Frank Reed
3. 2021-01-23 09:56 David Iwancio

21 Jan 2021 – 23 Jan 2021 : GPS AntiSpoof and integrating sextants?

1. 2021-01-21 21:23 Tony Oz
2. 2021-01-21 23:26 David Pike
3. 2021-01-22 09:02 Tony Oz
4. 2021-01-22 09:45 David Pike
5. 2021-01-22 14:38 Tony Oz
6. 2021-01-23 10:28 Bill Ritchie

22 Jan 2021 – 23 Jan 2021 : Modern Celestial ONE: Sextants & Sun Sights

1. 2021-01-22 17:10 Frank Reed
2. 2021-01-23 17:05 Sam Lyness

23 Jan 2021 – 23 Jan 2021 : Two More free Webinars

1. 2021-01-23 19:37 David Pike

23 Jan 2021 – 23 Jan 2021 : Reconditioned Link A-12 Aircraft Bubble Sextant For Sale

1. 2021-01-23 21:35 Robert Swartz

23 Jan 2021 – 24 Jan 2021 : A-10 Bubble Sextant Assembly

1. 2021-01-23 20:25 Noell Wilson
2. 2021-01-24 02:16 Gary LaPook
3. 2021-01-24 02:17 Gary LaPook
4. 2021-01-24 18:58 Noell Wilson

24 Jan 2021 – 24 Jan 2021 : Re: Online meeting today 2300 UT (6pm EST)

1. 2021-01-24 21:24 Frank Reed

24 Jan 2021 – 25 Jan 2021 : NY Times Article on GPS

1. 2021-01-24 15:36 Chris Post
2. 2021-01-24 19:15 Robert Goldberg
3. 2021-01-24 23:59 Bill B
4. 2021-01-25 00:16 Doug Faunt
5. 2021-01-25 16:43 Robert Swartz
6. 2021-01-25 16:52 Frank Reed
7. 2021-01-25 17:19 Simon Horwith

24 Jan 2021 – 25 Jan 2021 : Polhemus Celestial Computer and Coriolis Correction

1. 2021-01-24 00:09 Ed Popko
2. 2021-01-24 02:08 Gary LaPook
3. 2021-01-24 02:20 Gary LaPook
4. 2021-01-24 10:43 Ed Popko
5. 2021-01-25 06:32 Gary LaPook
6. 2021-01-25 16:38 Ed Popko
7. 2021-01-25 20:20 Gary LaPook

26 Jan 2021 – 26 Jan 2021 : NOAA Competition: MagNet: Model the Geomagnetic Field

1. 2021-01-26 14:01 John Carbone
2. 2021-01-26 17:59 Frank Reed

26 Jan 2021 – 26 Jan 2021 : Celestial Navigation 19th Century Methods Workshop

1. 2021-01-26 18:46 Frank Reed

05 Jan 2021 – 27 Jan 2021 : Re: Astro slide rule

1. 2021-01-05 00:24 Alan S
2. 2021-01-27 00:23 Alan S

26 Jan 2021 – 27 Jan 2021 : Re: HO 208 vs Compact NA tables.

1. 2021-01-26 17:59 Frederick Curtis
2. 2021-01-26 18:51 Gary LaPook
3. 2021-01-26 20:51 Greg Rudzinski
4. 2021-01-26 21:11 David C
5. 2021-01-26 21:55 Tibor Miseta
6. 2021-01-26 21:57 David C
7. 2021-01-27 07:13 Gary LaPook
8. 2021-01-27 23:58 Greg Rudzinski

26 Jan 2021 – 28 Jan 2021 : Eye cup for my sextant

1. 2021-01-26 20:06 Brandon Michael Morgan
2. 2021-01-28 02:00 Robert Swartz
3. 2021-01-28 02:39 Simon Horwith
4. 2021-01-28 04:29 Brandon Michael Morgan

25 Jan 2021 – 29 Jan 2021 : Astrolabes

1. 2021-01-25 17:10 Bob Goethe
2. 2021-01-25 18:08 Frank Reed
3. 2021-01-26 05:45 Geoffrey Kolbe
4. 2021-01-26 08:09 Gary LaPook
5. 2021-01-26 08:15 Geoffrey Kolbe
6. 2021-01-26 08:19 Herman Dekker
7. 2021-01-26 08:27 Gary LaPook
8. 2021-01-26 12:46 Ed Popko
9. 2021-01-28 14:44 Geoffrey Kolbe
10. 2021-01-29 08:51 Gary LaPook

29 Jan 2021 – 29 Jan 2021 : Online meeting today 2000 UT (3pm EST, noon PST)

1. 2021-01-29 17:36 Frank Reed

28 Jan 2021 – 29 Jan 2021 : The "Online Nautical Almanac (UPDATED)" to accept dates in the ISO-8601 format?

1. 2021-01-28 11:19 Tony Oz
2. 2021-01-28 18:59 Frank Reed
3. 2021-01-29 08:28 Tony Oz
4. 2021-01-29 18:51 Frank Reed
5. 2021-01-29 19:32 Simon Horwith
6. 2021-01-29 19:33 John Clements
7. 2021-01-29 21:19 Peter Monta

30 Jan 2021 – 30 Jan 2021 : Tatakoto subSun

1. 2021-01-30 01:09 Frank Reed

29 Jan 2021 – 30 Jan 2021 : 1946 US Coast Guard Sextant

1. 2021-01-29 23:55 Carl Main
2. 2021-01-30 01:42 Michael Cain
3. 2021-01-30 06:25 Sean C
4. 2021-01-30 20:46 Robert VanderPol II

31 Jan 2021 – 31 Jan 2021 : No Sunday "Office Hours" tomorrow (Jan 31)

1. 2021-01-31 02:19 Frank Reed

31 Jan 2021 – 01 Feb 2021 : What constitutes Round The World (RTW) ?

1. 2021-01-31 14:04 Bob Crawley
2. 2021-01-31 15:50 Bill Lionheart
3. 2021-02-01 13:07 Bob Crawley
4. 2021-02-01 14:44 Bill Lionheart

01 Feb 2021 – 01 Feb 2021 : ION PTTI/ITM Plenary Session Presentations

1. 2021-02-01 21:37 Richard B. Langley

06 Jan 2021 – 02 Feb 2021 : Re: Excel Almanac

1. 2021-01-06 08:46 Sean C
2. 2021-01-06 15:13 Herman Dekker
3. 2021-01-07 07:38 Sean C
4. 2021-01-07 11:32 Bill Ritchie
5. 2021-01-07 14:23 Sean C
6. 2021-01-07 15:28 Dave Walden
7. 2021-01-07 18:37 Herman Dekker
8. 2021-01-07 23:36 Murray Peake
9. 2021-01-08 00:02 Sean C
10. 2021-01-08 00:16 Sean C
11. 2021-01-08 08:00 Wolfgang Hasper
12. 2021-01-09 09:55 Sean C
13. 2021-01-16 08:51 Sean C
14. 2021-01-23 11:37 Sean C
15. 2021-01-23 18:45 Geoffrey Kolbe
16. 2021-01-23 19:08 David Pike
17. 2021-01-27 22:47 Sean C
18. 2021-02-02 12:38 Sean C

02 Feb 2021 – 02 Feb 2021 : Free Webinar - Why people get lost in buildings

1. 2021-02-02 16:53 David Pike

02 Feb 2021 – 02 Feb 2021 : Circum nav solo with sextant and paper chart

1. 2021-02-02 08:28 Bill Lionheart
2. 2021-02-02 14:38 Greg Rudzinski
3. 2021-02-02 17:37 Bill Lionheart

02 Feb 2021 – 02 Feb 2021 : What is a naut?

1. 2021-02-02 01:39 David C
2. 2021-02-02 05:53 Sean C
3. 2021-02-02 14:41 Ken Muldrew
4. 2021-02-02 17:56 David Pike

03 Feb 2021 – 03 Feb 2021 : Re: CN - quick reference card

1. 2021-02-03 14:18 Mike Burkes

03 Feb 2021 – 04 Feb 2021 : About the Waylosing: my own experience.

1. 2021-02-03 14:02 Tony Oz
2. 2021-02-03 17:51 Doug Faunt
3. 2021-02-04 09:48 Gary LaPook

04 Feb 2021 – 04 Feb 2021 : Friday online "Office Hours" 2000 UT (3pm EST)

1. 2021-02-04 23:17 Frank Reed

05 Feb 2021 – 05 Feb 2021 : Analemma.com updated!

1. 2021-02-05 16:39 Frank Reed

07 Feb 2021 – 07 Feb 2021 : RDF

1. 2021-02-07 20:43 Bill Lionheart

02 Feb 2021 – 07 Feb 2021 : Plath certificate: drop of solder

1. 2021-02-02 19:10 Frank Reed
2. 2021-02-02 20:16 Michael Cain
3. 2021-02-02 20:57 David Pike
4. 2021-02-03 05:56 Bill Roberts
5. 2021-02-05 14:18 Terry Syrokosz
6. 2021-02-05 16:16 Michael Cain
7. 2021-02-05 16:34 David Pike
8. 2021-02-05 18:04 David Pike
9. 2021-02-05 20:34 Wolfgang Hasper
10. 2021-02-06 08:12 Terry Syrokosz
11. 2021-02-06 19:04 Michael Cain
12. 2021-02-07 16:22 Terry Syrokosz
13. 2021-02-07 20:55 Michael Cain

08 Feb 2021 – 08 Feb 2021 : Re: Rdf

1. 2021-02-08 10:35 Gary LaPook
2. 2021-02-08 10:37 Gary LaPook
3. 2021-02-08 18:51 David Pike
4. 2021-02-08 19:25 David Pike
5. 2021-02-08 20:28 Gary LaPook

22 Jan 2021 – 10 Feb 2021 : Re: CP-300/U USAF Star Finder

1. 2021-01-22 23:10 Alan S
2. 2021-01-23 10:22 Gary LaPook
3. 2021-01-23 12:21 Ed Popko
4. 2021-02-08 17:40 Alan S
5. 2021-02-08 20:12 Gary LaPook
6. 2021-02-08 21:29 Michalis Vaidanis
7. 2021-02-09 17:36 Tony Oz
8. 2021-02-09 17:39 Dave Walden
9. 2021-02-09 19:28 Michalis Vaidanis
10. 2021-02-09 20:43 Dave Walden
11. 2021-02-10 01:19 Frank Reed
12. 2021-02-10 01:51 Gary LaPook
13. 2021-02-10 10:06 Tony Oz
14. 2021-02-10 15:01 Michalis Vaidanis

07 Feb 2021 – 11 Feb 2021 : A Plath Sextant listed for sale with an odd eye piece

1. 2021-02-07 10:21 Glen Swanson
2. 2021-02-07 16:05 Michael Cain
3. 2021-02-07 17:27 Glen Swanson
4. 2021-02-08 05:35 Sean C
5. 2021-02-08 06:56 Glen Swanson
6. 2021-02-08 20:16 Paul Saffo
7. 2021-02-08 20:26 Paul Saffo
8. 2021-02-09 17:18 Glen Swanson
9. 2021-02-11 00:31 Paul Saffo
10. 2021-02-11 11:39 Glen Swanson

10 Feb 2021 – 11 Feb 2021 : How Convincing is a Lunar Eclipse for Proving the Earth is a Sphere?

1. 2021-02-10 17:11 David Pike
2. 2021-02-11 13:56 Geoffrey Kolbe
3. 2021-02-11 16:30 David Pike
4. 2021-02-11 19:25 Frank Reed

09 Feb 2021 – 11 Feb 2021 : Sun Slow Day

1. 2021-02-09 19:31 Frank Reed
2. 2021-02-10 22:06 Paul Werner
3. 2021-02-11 22:59 David Pike
4. 2021-02-11 23:20 David Pike

06 Feb 2021 – 11 Feb 2021 : Office Hours Ageton Classic

1. 2021-02-06 07:04 Herman Dekker
2. 2021-02-06 15:46 Herman Dekker
3. 2021-02-06 21:05 Greg Rudzinski
4. 2021-02-07 13:34 Greg Rudzinski
5. 2021-02-10 15:52 Huub Robroek
6. 2021-02-10 16:53 Greg Rudzinski
7. 2021-02-10 18:37 Greg Rudzinski
8. 2021-02-10 18:44 Huub Robroek
9. 2021-02-11 17:59 Huub Robroek
10. 2021-02-11 19:06 Tibor Miseta
11. 2021-02-11 19:16 Tibor Miseta
12. 2021-02-11 19:57 Huub Robroek
13. 2021-02-11 20:31 David Fleming
14. 2021-02-11 21:23 Greg Rudzinski
15. 2021-02-11 23:23 Huub Robroek

02 Feb 2021 – 12 Feb 2021 : Re: Celestial Navigation in the Movies

1. 2021-02-02 09:15 Tony Oz
2. 2021-02-02 17:39 David Pike
3. 2021-02-02 18:13 Frank Reed
4. 2021-02-02 18:31 Frank Reed
5. 2021-02-02 19:38 Frank Reed
6. 2021-02-04 13:06 Andy Howse
7. 2021-02-12 09:43 Tony Oz

11 Feb 2021 – 13 Feb 2021 : On this CP-300\U, recently discussed.

1. 2021-02-11 21:14 Alan S
2. 2021-02-12 01:31 Dave Walden
3. 2021-02-12 16:25 Alan S
4. 2021-02-12 19:52 Tracy Shrier
5. 2021-02-12 20:32 Alan S
6. 2021-02-12 23:02 Michalis Vaidanis
7. 2021-02-12 23:16 Alan S
8. 2021-02-12 23:19 Gary LaPook
9. 2021-02-13 08:51 David Pike

12 Feb 2021 – 13 Feb 2021 : Office Hours Today, 3pm EST (2000 UT)

1. 2021-02-12 17:32 Frank Reed
2. 2021-02-13 13:13 Greg Rudzinski

14 Feb 2021 – 15 Feb 2021 : Online Office Hours: 6pm EST (2300 UT) Practical Lunars

1. 2021-02-14 19:46 Frank Reed
2. 2021-02-14 21:19 Richard Toohey
3. 2021-02-15 06:14 Sean C
4. 2021-02-15 21:35 Richard Toohey

15 Feb 2021 – 15 Feb 2021 : C Plath Yachtsman

1. 2021-02-15 19:06 Simon Horwith
2. 2021-02-15 20:17 John Clements
3. 2021-02-15 20:18 Simon Horwith
4. 2021-02-15 20:38 Michael Cain
5. 2021-02-15 21:41 Simon Horwith

15 Feb 2021 – 16 Feb 2021 : Sun's Blue and Golden Hours

1. 2021-02-15 13:38 Ed Popko
2. 2021-02-15 17:22 Rafael C. Caruso
3. 2021-02-16 15:28 Ed Popko
4. 2021-02-16 16:22 Frank Reed

14 Feb 2021 – 16 Feb 2021 : Moon Amplitude

1. 2021-02-14 17:21 Capt Bob Glover III
2. 2021-02-14 22:01 Greg Rudzinski
3. 2021-02-14 22:48 David Iwancio
4. 2021-02-16 00:32 Jeremy C
5. 2021-02-16 21:45 Capt Bob Glover III

15 Feb 2021 – 16 Feb 2021 : Sextant double reflection: angles halved

1. 2021-02-15 14:29 Richard Toohey
2. 2021-02-15 22:01 David Pike
3. 2021-02-15 22:44 David Pike
4. 2021-02-15 23:26 Richard Toohey
5. 2021-02-16 01:22 David Pike
6. 2021-02-16 11:51 Richard Toohey
7. 2021-02-16 17:49 David Pike
8. 2021-02-16 20:31 Richard Toohey
9. 2021-02-16 22:32 David Pike

15 Feb 2021 – 17 Feb 2021 : 1950s C Plath sextant

1. 2021-02-15 03:08 Patrick Dickie
2. 2021-02-15 12:42 Capt Bob Glover III
3. 2021-02-15 15:14 Richard Toohey
4. 2021-02-15 16:53 Bill Roberts
5. 2021-02-15 17:24 Patrick Dickie
6. 2021-02-15 21:57 Capt Bob Glover III
7. 2021-02-16 00:13 Patrick Dickie
8. 2021-02-16 21:43 Capt Bob Glover III
9. 2021-02-17 03:50 Patrick Dickie

18 Feb 2021 – 18 Feb 2021 : Resilient Position, Navigation And Timing - Training Seminar 1 Of 4 At 15.00Utc Today!!

1. 2021-02-18 13:06 David Pike

17 Feb 2021 – 19 Feb 2021 : 16 Astronomy eBooks for $18

1. 2021-02-17 13:41 Sean C
2. 2021-02-17 18:58 David Pike
3. 2021-02-17 21:21 Dave Walden
4. 2021-02-18 06:19 Sean C
5. 2021-02-19 08:45 David Pike

19 Feb 2021 – 19 Feb 2021 : Udemy free course on CN

1. 2021-02-19 09:47 Igor S.

18 Feb 2021 – 19 Feb 2021 : Korean War – Naval Eyewitness

1. 2021-02-18 12:59 David Pike
2. 2021-02-19 11:15 Andrés Ruiz

15 Feb 2021 – 19 Feb 2021 : True North and Precession

1. 2021-02-15 16:59 Jim Rives
2. 2021-02-16 02:34 Ian Vaughn
3. 2021-02-16 09:59 Bill Lionheart
4. 2021-02-16 17:40 Frank Reed
5. 2021-02-16 20:42 Jim Rives
6. 2021-02-17 08:42 Bill Lionheart
7. 2021-02-18 20:10 Jim Rives
8. 2021-02-19 00:12 Sean C
9. 2021-02-19 00:25 Frank Reed
10. 2021-02-19 15:21 James F Campbell
11. 2021-02-19 16:09 Frank Reed

19 Feb 2021 – 19 Feb 2021 : NO online Office Hours meetings this weekend

1. 2021-02-19 16:17 Frank Reed

19 Feb 2021 – 20 Feb 2021 : Bowditch 2019 Sucks

1. 2021-02-19 09:55 joe ben
2. 2021-02-19 15:31 Frank Reed
3. 2021-02-19 15:57 Frank Reed
4. 2021-02-19 16:39 Dustin Baenen
5. 2021-02-20 01:59 Richard Toohey

20 Feb 2021 – 20 Feb 2021 : Prob 1/4 of being in a cocked hat

1. 2021-02-20 22:14 Bill Lionheart

21 Feb 2021 – 21 Feb 2021 : Sunrise on the Moon?

1. 2021-02-21 08:20 Bob Crawley
2. 2021-02-21 16:06 Frank Reed

19 Feb 2021 – 22 Feb 2021 : Bowditch editions: good and bad

1. 2021-02-19 23:29 Rafael C. Caruso
2. 2021-02-19 23:36 James F Campbell
3. 2021-02-20 02:01 Frank Reed
4. 2021-02-20 03:57 David C
5. 2021-02-20 17:29 Rafael C. Caruso
6. 2021-02-20 21:30 David C
7. 2021-02-21 09:38 Wolfgang Köberer
8. 2021-02-22 20:24 Gary LaPook

23 Feb 2021 – 23 Feb 2021 : Orion North Arrow

1. 2021-02-23 03:52 Frank Reed

23 Feb 2021 – 23 Feb 2021 : Online celestial navigation seminar by Margaret E. Schotte tomorrow

1. 2021-02-23 15:08 Luc Van den Borre
2. 2021-02-23 16:12 Frank Reed
3. 2021-02-23 16:37 David Pike

19 Feb 2021 – 23 Feb 2021 : Moon’s Horns Conundrum

1. 2021-02-19 09:21 David Pike
2. 2021-02-19 16:43 David Pike
3. 2021-02-19 16:49 Frank Reed
4. 2021-02-20 06:25 Geoffrey Kolbe
5. 2021-02-20 06:56 Frank Reed
6. 2021-02-23 16:58 David Pike

23 Feb 2021 – 23 Feb 2021 : 2102-D and CP-300/U starfinder altitude/azimuth grid projection

1. 2021-02-23 22:06 Michalis Vaidanis

24 Feb 2021 – 24 Feb 2021 : A little Mars for you...

1. 2021-02-24 21:15 Frank Reed

24 Feb 2021 – 25 Feb 2021 : IERS Message: New release of the IAU SOFA software library

1. 2021-02-24 21:00 Richard B. Langley
2. 2021-02-25 13:39 Dave Walden

25 Feb 2021 – 25 Feb 2021 : One of the silliest articles I've read on map projections

1. 2021-02-25 18:33 Lu Abel

26 Feb 2021 – 26 Feb 2021 : Cooke, Throughton & Simms T63 info

1. 2021-02-26 13:18 David Harrison

26 Feb 2021 – 26 Feb 2021 : Online meeting today: 3pm EST (2000 UT)

1. 2021-02-26 17:58 Frank Reed

23 Feb 2021 – 28 Feb 2021 : Breaking News....

1. 2021-02-23 04:30 Greg B
2. 2021-02-23 15:54 Manuel Cruz
3. 2021-02-23 21:02 Greg Rudzinski
4. 2021-02-24 03:00 Ken Gebhart
5. 2021-02-25 21:56 Hewitt Schlereth
6. 2021-02-28 16:15 Sam Lyness
7. 2021-02-28 21:41 Tom Sult

14 Feb 2021 – 01 Mar 2021 : Stereographic Projection of the Ecliptic

1. 2021-02-14 19:59 David Pike
2. 2021-02-15 06:33 Geoffrey Kolbe
3. 2021-02-15 08:30 Wolfgang Hasper
4. 2021-02-15 09:43 Geoffrey Kolbe
5. 2021-02-15 11:29 David Pike
6. 2021-02-15 13:22 Mike Mayer
7. 2021-02-15 13:22 Robin Stuart
8. 2021-02-15 13:48 Tony Oz
9. 2021-02-15 17:45 D Maracle
10. 2021-02-15 17:52 Geoffrey Kolbe
11. 2021-02-15 19:12 David Pike
12. 2021-03-01 11:15 David Pike

25 Feb 2021 – 01 Mar 2021 : Push out laser cut plywood models from China

1. 2021-02-25 20:33 David Pike
2. 2021-02-26 16:59 Dustin Baenen
3. 2021-02-26 18:15 Frank Reed
4. 2021-02-26 19:52 David Pike
5. 2021-02-26 20:37 Huub Robroek
6. 2021-02-27 17:46 David Pike
7. 2021-02-27 21:22 Huub Robroek
8. 2021-02-28 21:59 Igor S.
9. 2021-03-01 00:15 Huub Robroek
10. 2021-03-01 09:01 David Pike
11. 2021-03-01 17:47 Herman Dekker
12. 2021-03-01 19:00 David Pike

01 Mar 2021 – 01 Mar 2021 : Some updates for web apps

1. 2021-03-01 19:40 Frank Reed

01 Mar 2021 – 02 Mar 2021 : Fifty thousand messages since 2006

1. 2021-03-01 19:44 Frank Reed
2. 2021-03-02 06:00 Frank Reed

23 Feb 2021 – 03 Mar 2021 : Surveying problem

1. 2021-02-23 15:14 Mike Burkes
2. 2021-02-23 16:17 Marty Lyons
3. 2021-02-23 16:52 Mike Burkes
4. 2021-02-23 17:30 Mike Burkes
5. 2021-02-24 13:54 David Pike
6. 2021-02-24 20:44 David Pike
7. 2021-02-25 01:17 Marty Lyons
8. 2021-02-25 08:18 David Pike
9. 2021-02-25 09:07 David Pike
10. 2021-02-25 12:14 Mike Burkes
11. 2021-02-25 12:22 Mike Burkes
12. 2021-02-25 14:21 Geoffrey Kolbe
13. 2021-02-25 16:55 Mike Burkes
14. 2021-02-25 17:02 Mike Burkes
15. 2021-02-26 15:34 Mike Burkes
16. 2021-03-02 19:59 Lars Bergman
17. 2021-03-03 13:12 Mike Burkes

03 Mar 2021 – 04 Mar 2021 : Calculate the declination of the Sun in your head

1. 2021-03-03 20:29 David Pike
2. 2021-03-03 22:09 David Fleming
3. 2021-03-03 23:08 Bob Goethe
4. 2021-03-04 02:31 Joshua Hunley
5. 2021-03-04 02:53 Joshua Hunley

01 Mar 2021 – 04 Mar 2021 : Calculate GHA Aries in your head

1. 2021-03-01 17:02 Joshua Hunley
2. 2021-03-01 17:40 John Baum
3. 2021-03-01 18:12 Joshua Hunley
4. 2021-03-01 23:44 Gary LaPook
5. 2021-03-01 23:46 Gary LaPook
6. 2021-03-01 23:49 Gary LaPook
7. 2021-03-02 05:54 Geoffrey Kolbe
8. 2021-03-02 21:28 Joshua Hunley
9. 2021-03-03 18:35 Tony Oz
10. 2021-03-03 19:10 Frank Reed
11. 2021-03-03 21:23 Joshua Hunley
12. 2021-03-03 23:00 Bob Goethe
13. 2021-03-04 07:55 Tony Oz
14. 2021-03-04 08:44 Gary LaPook
15. 2021-03-04 08:58 Gary LaPook

04 Mar 2021 – 04 Mar 2021 : The Where's Amelia Earhart drama continues

1. 2021-03-04 14:17 Ed Popko
2. 2021-03-04 22:46 Dustin Baenen

05 Mar 2021 – 05 Mar 2021 : Link A-12 Aircraft Bubble Sextant Reconditioned--F.S.

1. 2021-03-05 00:27 Robert Swartz

02 Mar 2021 – 05 Mar 2021 : Re: Calculate GHA Aries/Some updates for web apps

1. 2021-03-02 08:16 Sean C
2. 2021-03-02 20:44 Joshua Hunley
3. 2021-03-05 02:43 Sean C
4. 2021-03-05 19:42 Joshua Hunley

05 Mar 2021 – 05 Mar 2021 : Online "Office Hours" meeting NEXT Friday, March 12

1. 2021-03-05 19:43 Frank Reed

05 Mar 2021 – 05 Mar 2021 : Military GPS Jamming Affects Commercial Aircraft (IEEE Spectrum)

1. 2021-03-05 20:31 Mike Mayer

06 Mar 2021 – 06 Mar 2021 : Now all we need to do is to put scents on navigation aids

1. 2021-03-06 00:28 Lu Abel

07 Mar 2021 – 07 Mar 2021 : DRAFT of 'A Perpetual Almanac for the Sun and Stars 2020-2050' (Using difference tables)

1. 2021-03-07 17:01 Joshua Hunley

26 Feb 2021 – 07 Mar 2021 : Another surveying problem

1. 2021-02-26 16:24 Mike Burkes
2. 2021-02-26 19:36 Andy Howse
3. 2021-02-26 21:43 Mike Burkes
4. 2021-03-02 15:38 Lars Bergman
5. 2021-03-02 18:24 Mike Burkes
6. 2021-03-03 13:53 David Pike
7. 2021-03-03 15:22 Robert Bernecky
8. 2021-03-03 22:31 Lars Bergman
9. 2021-03-06 23:48 David Pike
10. 2021-03-07 20:11 David Pike

25 Feb 2021 – 08 Mar 2021 : Sextant calibration accessory

1. 2021-02-25 22:26 Peter Monta
2. 2021-02-25 23:05 Frank Reed
3. 2021-02-26 00:44 Peter Monta
4. 2021-02-26 13:30 Greg Rudzinski
5. 2021-02-27 05:07 Peter Monta
6. 2021-02-27 20:28 Frank Reed
7. 2021-02-27 22:35 Bill Morris
8. 2021-02-28 03:05 Peter Monta
9. 2021-02-28 03:09 Peter Monta
10. 2021-03-08 17:15 Fred Hebard

07 Mar 2021 – 08 Mar 2021 : A10 bubble sextant bulb holder

1. 2021-03-07 10:37 K McGrath
2. 2021-03-07 17:24 Joshua Hunley
3. 2021-03-08 23:06 Bill Morris

05 Mar 2021 – 09 Mar 2021 : Dip

1. 2021-03-05 17:23 Alexandre Eremenko
2. 2021-03-05 17:38 Lu Abel
3. 2021-03-05 20:16 Alexandre Eremenko
4. 2021-03-07 23:03 Bob Goethe
5. 2021-03-07 23:50 David Fleming
6. 2021-03-08 00:33 Alexandre Eremenko
7. 2021-03-08 04:12 Nick M
8. 2021-03-09 22:44 Frank Reed

08 Mar 2021 – 10 Mar 2021 : Re: Celesticomp V instructions

1. 2021-03-08 23:25 David Arenburg
2. 2021-03-09 10:45 Ian Gifford
3. 2021-03-09 12:13 Dave Walden
4. 2021-03-09 14:05 John Rizzuto
5. 2021-03-09 17:28 Ian Gifford
6. 2021-03-10 11:03 David Arenburg

10 Mar 2021 – 10 Mar 2021 : Rare alignment of annual phenomena

1. 2021-03-10 16:45 Frank Reed
2. 2021-03-10 23:59 Rafael C. Caruso

11 Mar 2021 – 11 Mar 2021 : Navigation Progs from NewZealand.

1. 2021-03-11 10:03 Herman Dekker

10 Mar 2021 – 11 Mar 2021 : New versions of GPS Anti Spoof apps

1. 2021-03-10 22:21 Frank Reed
2. 2021-03-11 10:47 Tony Oz

11 Mar 2021 – 11 Mar 2021 : Re: Perihelion coming up in a few minutes

1. 2021-03-11 18:11 Alexander Duytschaever

11 Mar 2021 – 12 Mar 2021 : Location of Venus

1. 2021-03-11 21:33 Bob Goethe
2. 2021-03-12 00:37 Frank Reed
3. 2021-03-12 00:47 Frank Reed

10 Mar 2021 – 13 Mar 2021 : Celesticomp V and other pocket computers

1. 2021-03-10 10:47 Glen Swanson
2. 2021-03-10 16:19 Tony Oz
3. 2021-03-10 17:04 Glen Swanson
4. 2021-03-10 18:16 Frank Reed
5. 2021-03-10 19:59 Dave Walden
6. 2021-03-11 12:21 Tony Oz
7. 2021-03-11 17:24 Glen Swanson
8. 2021-03-11 20:46 Tony Oz
9. 2021-03-12 08:19 Tony Oz
10. 2021-03-13 09:56 Glen Swanson

13 Mar 2021 – 13 Mar 2021 : Re: Celesticomp V (more pages from M Har ris’ book)

1. 2021-03-13 10:16 Glen Swanson

02 Mar 2021 – 13 Mar 2021 : Re: Wind Velocity from Three Drifts

1. 2021-03-02 18:43 Mike Burkes
2. 2021-03-03 08:48 Gary LaPook
3. 2021-03-03 16:06 David Pike
4. 2021-03-03 18:26 Gary LaPook
5. 2021-03-03 19:46 David Pike
6. 2021-03-05 09:34 Gary LaPook
7. 2021-03-05 21:07 David Pike
8. 2021-03-06 11:26 Brian Walton
9. 2021-03-07 23:48 Tony Oz
10. 2021-03-08 09:40 David Pike
11. 2021-03-08 19:38 Gary LaPook
12. 2021-03-08 21:04 David Pike
13. 2021-03-08 21:05 Gary LaPook
14. 2021-03-09 12:03 Ed Popko
15. 2021-03-09 12:33 Tony Oz
16. 2021-03-09 16:54 David Pike
17. 2021-03-09 19:05 Tony Oz
18. 2021-03-10 17:57 David Pike
19. 2021-03-11 01:10 David C
20. 2021-03-11 01:19 David C
21. 2021-03-11 20:28 David Pike
22. 2021-03-11 20:55 Gary LaPook
23. 2021-03-11 20:57 Gary LaPook
24. 2021-03-11 23:59 Ed Popko
25. 2021-03-12 14:27 Tony Oz
26. 2021-03-12 19:54 Tony Oz
27. 2021-03-12 20:37 Gary LaPook
28. 2021-03-13 07:00 Gary LaPook
29. 2021-03-13 07:02 Gary LaPook
30. 2021-03-13 07:05 Gary LaPook
31. 2021-03-13 07:09 Gary LaPook
32. 2021-03-13 07:11 Gary LaPook
33. 2021-03-13 07:16 Gary LaPook
34. 2021-03-13 09:07 David Pike
35. 2021-03-13 11:09 Gary LaPook
36. 2021-03-13 11:11 Gary LaPook
37. 2021-03-13 13:39 Brian Walton
38. 2021-03-13 18:57 David Pike

13 Mar 2021 – 13 Mar 2021 : Planispheres

1. 2021-03-13 19:06 Bob Goethe

13 Mar 2021 – 13 Mar 2021 : Navigating the Royals

1. 2021-03-13 20:26 David Pike

13 Mar 2021 – 13 Mar 2021 : The Ancient Greek Antikythera Mechanism

1. 2021-03-13 13:48 Ed Popko
2. 2021-03-13 16:29 Chris Post
3. 2021-03-13 17:20 Rafael C. Caruso
4. 2021-03-13 21:23 Ed Popko

11 Mar 2021 – 14 Mar 2021 : Davis Worksheets

1. 2021-03-11 01:20 Tracy Shrier
2. 2021-03-11 08:55 Herman Dekker
3. 2021-03-14 16:59 Noell Wilson

12 Mar 2021 – 15 Mar 2021 : Today's "Office Hours" postponed to Monday

1. 2021-03-12 17:05 Frank Reed
2. 2021-03-15 17:42 Frank Reed

13 Mar 2021 – 16 Mar 2021 : Surface Mail from Canada

1. 2021-03-13 11:35 David Pike
2. 2021-03-13 19:06 Bob Goethe
3. 2021-03-14 03:45 David C
4. 2021-03-16 07:04 David Iwancio

14 Mar 2021 – 16 Mar 2021 : Capt. Sumner's First LOP

1. 2021-03-14 19:02 Bruce J. Pennino
2. 2021-03-14 20:50 Bob Goethe
3. 2021-03-15 17:48 Frank Reed
4. 2021-03-16 17:24 Bruce J. Pennino

02 Mar 2021 – 16 Mar 2021 : DIY Starfinder - a lockdown project

1. 2021-03-02 20:52 Tibor Miseta
2. 2021-03-03 03:37 Robert VanderPol II
3. 2021-03-03 09:09 Tony Oz
4. 2021-03-04 08:14 Tony Oz
5. 2021-03-04 17:48 Tibor Miseta
6. 2021-03-04 22:42 Ed Popko
7. 2021-03-05 08:51 Tony Oz
8. 2021-03-06 19:55 Michalis Vaidanis
9. 2021-03-13 23:12 Tibor Miseta
10. 2021-03-16 19:35 Michalis Vaidanis

19 Feb 2021 – 17 Mar 2021 : An All-Haversine Azimuth (from Lat, Dec and dLon alone)?

1. 2021-02-19 14:54 Tony Oz
2. 2021-02-19 16:58 Frederick Curtis
3. 2021-02-19 19:40 David C
4. 2021-02-19 20:39 David C
5. 2021-02-19 22:11 David C
6. 2021-02-20 11:16 Tony Oz
7. 2021-02-20 21:03 David C
8. 2021-02-20 21:57 David C
9. 2021-02-21 15:30 Lars Bergman
10. 2021-02-21 19:10 Tony Oz
11. 2021-02-22 11:29 Lars Bergman
12. 2021-02-22 18:48 Tony Oz
13. 2021-03-16 09:27 Willi Strohl
14. 2021-03-17 08:59 Tony Oz

17 Mar 2021 – 17 Mar 2021 : Satellite navigation in reverse

1. 2021-03-17 20:19 Frank Reed

18 Mar 2021 – 18 Mar 2021 : Sun northbound at one knot

1. 2021-03-18 05:09 Frank Reed

19 Mar 2021 – 19 Mar 2021 : Bausch and Lomb A8-A Aircraft bubble sextant F.S.

1. 2021-03-19 02:48 Robert Swartz

18 Mar 2021 – 19 Mar 2021 : NY Times article on GPS vulnerabilities

1. 2021-03-18 16:14 Lu Abel
2. 2021-03-18 21:20 David Pike
3. 2021-03-19 04:33 David C
4. 2021-03-19 12:44 James F Campbell

19 Mar 2021 – 19 Mar 2021 : Northeast US, eastern Canada: Space Station pass this evening

1. 2021-03-19 22:52 Frank Reed

20 Mar 2021 – 20 Mar 2021 : Silvering mirrors with mercury-tin amalgam

1. 2021-03-20 02:31 Bill Morris
2. 2021-03-20 07:52 Murray Peake
3. 2021-03-20 09:05 Geoff Hitchcox
4. 2021-03-20 11:08 Lars Bergman
5. 2021-03-20 12:36 Dave Walden
6. 2021-03-20 12:41 Dave Walden
7. 2021-03-20 12:59 Dave Walden
8. 2021-03-20 13:17 Nick M
9. 2021-03-20 17:06 Jürgen Hoefeld
10. 2021-03-20 18:37 Bill Morris

22 Mar 2021 – 22 Mar 2021 : Moon's horns point North/South

1. 2021-03-22 00:50 Frank Reed
2. 2021-03-22 08:52 Geoffrey Kolbe
3. 2021-03-22 20:33 David Pike

17 Mar 2021 – 22 Mar 2021 : AH: windproof shades material

1. 2021-03-17 16:38 Igor S.
2. 2021-03-17 17:29 Greg Rudzinski
3. 2021-03-17 19:19 Modris Fersters
4. 2021-03-18 22:52 Igor S.
5. 2021-03-19 06:55 Gary LaPook
6. 2021-03-20 14:57 Modris Fersters
7. 2021-03-22 23:32 Igor S.
8. 2021-03-22 23:56 Bill Morris

23 Mar 2021 – 23 Mar 2021 : Royal Navy Revives Days Of Sail With Training On Tall Ship

1. 2021-03-23 10:45 David Pike

23 Mar 2021 – 23 Mar 2021 : Interstellar navigation with astrometry

1. 2021-03-23 19:42 Peter Monta

26 Mar 2021 – 26 Mar 2021 : Online meeting today 2000 UT (4pm EDT, 1pm PDT)

1. 2021-03-26 16:16 Frank Reed

23 Mar 2021 – 26 Mar 2021 : Free RIN Webinar: How the Aircraft Carriers Pilot in and out of Portsmouth

1. 2021-03-23 11:14 David Pike
2. 2021-03-23 11:42 David Pike
3. 2021-03-26 19:39 David Pike

26 Mar 2021 – 26 Mar 2021 : Rare footage of radio sextant

1. 2021-03-26 21:25 Igor S.

27 Mar 2021 – 27 Mar 2021 : Ebbco Sextant info

1. 2021-03-27 14:36 Herman Dekker
2. 2021-03-27 16:41 Greg Rudzinski

28 Mar 2021 – 28 Mar 2021 : Astrolabe Auction

1. 2021-03-28 01:55 Bruce J. Pennino

20 Feb 2021 – 28 Mar 2021 : Cel Nav Simulator

1. 2021-02-20 18:51 Jim Rives
2. 2021-02-21 06:14 Sean C
3. 2021-02-21 07:31 John Clements
4. 2021-02-22 18:21 Jim Rives
5. 2021-02-22 18:45 Jim Rives
6. 2021-02-22 19:39 Dustin Baenen
7. 2021-02-22 20:53 Jim Rives
8. 2021-02-22 20:57 Gary LaPook
9. 2021-02-22 23:20 Dustin Baenen
10. 2021-02-23 00:19 Jim Rives
11. 2021-02-23 17:57 Jim Rives
12. 2021-03-22 23:22 Eric van der Veen
13. 2021-03-24 15:40 Tony Oz
14. 2021-03-28 16:06 Eric van der Veen

03 Mar 2021 – 28 Mar 2021 : Non-navigational Star coordinates

1. 2021-03-03 18:05 Modris Fersters
2. 2021-03-04 21:58 Bill Ritchie
3. 2021-03-05 09:02 Modris Fersters
4. 2021-03-05 19:45 Dave Walden
5. 2021-03-06 12:42 Modris Fersters
6. 2021-03-06 18:28 Paul Hirose
7. 2021-03-06 18:30 Tibor Miseta
8. 2021-03-07 17:29 Modris Fersters
9. 2021-03-27 21:27 Peter Blaskett
10. 2021-03-28 18:58 Modris Fersters

25 Mar 2021 – 29 Mar 2021 : Telemeter/Quadrant

1. 2021-03-25 17:37 Paul Saffo
2. 2021-03-25 22:50 John Clements
3. 2021-03-28 18:10 Paul Saffo
4. 2021-03-28 22:10 Sean C
5. 2021-03-29 01:13 Doug Faunt
6. 2021-03-29 06:04 Gary LaPook
7. 2021-03-29 06:06 Gary LaPook
8. 2021-03-29 06:09 Gary LaPook

13 Mar 2021 – 29 Mar 2021 : Running down an Astro-Position Line

1. 2021-03-13 10:59 David Pike
2. 2021-03-14 17:10 Adrian F
3. 2021-03-14 18:51 David Pike
4. 2021-03-14 21:52 Michael Bradley
5. 2021-03-15 04:56 David C
6. 2021-03-15 08:12 Gary LaPook
7. 2021-03-15 10:17 David Pike
8. 2021-03-15 20:59 Gary LaPook
9. 2021-03-15 21:24 Brian Walton
10. 2021-03-15 21:33 David C
11. 2021-03-15 23:38 Bill Ritchie
12. 2021-03-16 07:51 Gary LaPook
13. 2021-03-16 09:21 Gary LaPook
14. 2021-03-16 10:27 Gary LaPook
15. 2021-03-16 11:01 Gary LaPook
16. 2021-03-16 11:05 Gary LaPook
17. 2021-03-16 11:14 Adrian F
18. 2021-03-16 17:32 Tony Oz
19. 2021-03-16 18:37 Bill Ritchie
20. 2021-03-16 19:17 Gary LaPook
21. 2021-03-16 19:20 Gary LaPook
22. 2021-03-16 19:31 Gary LaPook
23. 2021-03-16 20:19 David Pike
24. 2021-03-17 09:33 Michael Bradley
25. 2021-03-18 07:22 Gary LaPook
26. 2021-03-28 19:27 Gary LaPook
27. 2021-03-29 18:43 David Pike

29 Mar 2021 – 29 Mar 2021 : Suez Canal – Great News

1. 2021-03-29 18:18 David Pike
2. 2021-03-29 19:11 Gary LaPook
3. 2021-03-29 20:07 Frank Reed

29 Mar 2021 – 29 Mar 2021 : Can you find Aries?

1. 2021-03-29 20:18 Frank Reed

25 Mar 2021 – 30 Mar 2021 : Navigation by the Moon

1. 2021-03-25 01:55 Alexandre Eremenko
2. 2021-03-25 02:00 Frank Reed
3. 2021-03-25 03:29 Alexandre Eremenko
4. 2021-03-25 13:45 Tony Oz
5. 2021-03-25 16:18 Alexandre Eremenko
6. 2021-03-25 20:32 David Pike
7. 2021-03-27 08:28 Geoff Hitchcox
8. 2021-03-27 16:52 Alexandre Eremenko
9. 2021-03-27 17:11 Alexandre Eremenko
10. 2021-03-27 21:43 David Pike
11. 2021-03-30 02:55 Frank Reed
12. 2021-03-30 03:42 Frank Reed
13. 2021-03-30 07:44 Geoff Hitchcox

30 Mar 2021 – 30 Mar 2021 : The "B-17 Flying Fortress" game: any good as a CelNav simulator?

1. 2021-03-30 19:58 Tony Oz

23 Mar 2021 – 31 Mar 2021 : Re: Plot Sheet Generator

1. 2021-03-23 18:39 Alex L.
2. 2021-03-24 07:53 Tony Oz
3. 2021-03-24 18:49 Gary LaPook
4. 2021-03-24 21:23 David Pike
5. 2021-03-31 07:20 Gary LaPook

31 Mar 2021 – 31 Mar 2021 : A-10A WWII Airforce Sextant for parts/repair

1. 2021-03-31 16:49 Simon Horwith

31 Mar 2021 – 02 Apr 2021 : USNO Clone as an "under the hood" CN engine for a flight simulator?

1. 2021-03-31 15:50 Tony Oz
2. 2021-03-31 16:42 Dustin Baenen
3. 2021-03-31 17:29 Tony Oz
4. 2021-03-31 20:40 Dustin Baenen
5. 2021-04-02 18:42 Frank Reed

22 Mar 2021 – 03 Apr 2021 : Shooting my first Lunars

1. 2021-03-22 17:45 Huub Robroek
2. 2021-03-30 04:48 Frank Reed
3. 2021-03-30 23:03 Huub Robroek
4. 2021-04-03 13:47 Lars Bergman
5. 2021-04-03 19:52 Huub Robroek

01 Apr 2021 – 03 Apr 2021 : U.S. Navy Declares Gps Obsolete, Celestial The Future

1. 2021-04-01 12:15 John Carbone
2. 2021-04-01 17:09 Greg Rudzinski
3. 2021-04-01 19:04 Bruce Cutting
4. 2021-04-01 19:16 David Pike
5. 2021-04-01 23:16 Alan S
6. 2021-04-02 13:54 Fred Hebard
7. 2021-04-02 15:59 Dustin Baenen
8. 2021-04-02 16:07 Lu Abel
9. 2021-04-02 16:08 Don Seltzer
10. 2021-04-02 16:14 Doug Faunt
11. 2021-04-02 19:13 Doug Faunt
12. 2021-04-02 20:43 Don E. Bray
13. 2021-04-03 09:36 Fred Hebard
14. 2021-04-03 20:09 Don Seltzer
15. 2021-04-03 21:12 David C

03 Apr 2021 – 03 Apr 2021 : Backpackers discover the Nocturnal

1. 2021-04-03 22:21 Ed Popko

03 Apr 2021 – 04 Apr 2021 : A series of articles appearing in Ocean Navigator

1. 2021-04-03 20:42 Alan S
2. 2021-04-04 00:29 Greg Rudzinski
3. 2021-04-04 00:43 Ed Hlywa
4. 2021-04-04 00:49 Al Stewart
5. 2021-04-04 02:53 Alan S

05 Apr 2021 – 05 Apr 2021 : Royal Institute of Navigation Free Online Seminar

1. 2021-04-05 11:40 David Pike

04 Apr 2021 – 08 Apr 2021 : Matthew Flinders Charts

1. 2021-04-04 01:10 Peter Blaskett
2. 2021-04-04 07:27 Murray Peake
3. 2021-04-04 08:07 David Pike
4. 2021-04-04 08:29 David Pike
5. 2021-04-05 18:20 David Pike
6. 2021-04-07 04:26 Peter Blaskett
7. 2021-04-07 06:59 David Pike
8. 2021-04-08 00:44 Gary LaPook
9. 2021-04-08 06:33 Peter Blaskett

08 Apr 2021 – 08 Apr 2021 : Re: Mathew Flinders Charts.

1. 2021-04-08 04:21 John Brown
2. 2021-04-08 20:05 Peter Blaskett

09 Apr 2021 – 11 Apr 2021 : Online "Office Hours" meeting in two days (Sunday, 2000 UT)

1. 2021-04-09 16:38 Frank Reed
2. 2021-04-11 05:40 Frank Reed
3. 2021-04-11 16:52 Alan S
4. 2021-04-11 18:40 Frank Reed

13 Apr 2021 – 13 Apr 2021 : Étoile du Roy at Basque coast

1. 2021-04-13 11:38 Andrés Ruiz

13 Apr 2021 – 13 Apr 2021 : Fulford Nav Collection - Upcoming Estate Sale

1. 2021-04-13 23:18 John Turanin

15 Apr 2021 – 15 Apr 2021 : GHA of the Sun is easy today

1. 2021-04-15 17:00 Frank Reed

16 Apr 2021 – 16 Apr 2021 : Prince Philip championed GPS as Master of Trinity House

1. 2021-04-16 01:56 Richard B. Langley

16 Apr 2021 – 16 Apr 2021 : Unlike in ‘Lord of the Flies’

1. 2021-04-16 07:36 David Pike

16 Apr 2021 – 16 Apr 2021 : Another "Office Hours" session, 4pm Eastern (2000 UT)

1. 2021-04-16 03:51 Frank Reed
2. 2021-04-16 15:47 David Pike

08 Apr 2021 – 17 Apr 2021 : A Sun-compass landfall?

1. 2021-04-08 13:55 Tony Oz
2. 2021-04-08 17:51 Gary LaPook
3. 2021-04-09 08:28 David Pike
4. 2021-04-09 12:10 Tony Oz
5. 2021-04-10 13:25 David Pike
6. 2021-04-11 07:20 Geoffrey Kolbe
7. 2021-04-11 16:44 David Pike
8. 2021-04-11 18:22 David Pike
9. 2021-04-12 04:40 Geoffrey Kolbe
10. 2021-04-12 07:56 David Pike
11. 2021-04-12 08:02 David Pike
12. 2021-04-12 12:21 Tony Oz
13. 2021-04-16 05:27 Gary LaPook
14. 2021-04-16 05:37 Gary LaPook
15. 2021-04-16 07:21 David Pike
16. 2021-04-16 08:01 Gary LaPook
17. 2021-04-16 11:36 Tony Oz
18. 2021-04-17 06:35 Gary LaPook

17 Apr 2021 – 17 Apr 2021 : 2102-D, Crowding at High Declinations, Workaround

1. 2021-04-17 07:34 David Iwancio

18 Apr 2021 – 20 Apr 2021 : Re: Wind Velocity from Three Drifts

1. 2021-04-18 09:31 Bill Ritchie
2. 2021-04-18 21:14 Gary LaPook
3. 2021-04-19 11:00 Tony Oz
4. 2021-04-19 16:09 Bill Ritchie
5. 2021-04-19 23:41 Gary LaPook
6. 2021-04-20 00:17 Gary LaPook

12 Apr 2021 – 20 Apr 2021 : A Diy E6-B?

1. 2021-04-12 15:47 Tony Oz
2. 2021-04-13 08:28 David Pike
3. 2021-04-13 15:19 Tony Oz
4. 2021-04-13 17:57 David Pike
5. 2021-04-14 00:00 Paul Hirose
6. 2021-04-14 08:18 Tony Oz
7. 2021-04-15 03:54 Gary LaPook
8. 2021-04-15 07:47 David Pike
9. 2021-04-15 23:24 Gary LaPook
10. 2021-04-15 23:36 Gary LaPook
11. 2021-04-16 07:00 David Pike
12. 2021-04-16 08:01 Tony Oz
13. 2021-04-16 08:03 Gary LaPook
14. 2021-04-16 08:09 Tony Oz
15. 2021-04-16 14:56 David Pike
16. 2021-04-16 15:10 David Pike
17. 2021-04-16 15:17 David Pike
18. 2021-04-20 05:01 Gary LaPook
19. 2021-04-20 05:46 Gary LaPook
20. 2021-04-20 05:52 Gary LaPook
21. 2021-04-20 06:14 Gary LaPook

13 Apr 2021 – 20 Apr 2021 : Vulcan airborne sight reduction form?

1. 2021-04-13 09:58 Eric van der Veen
2. 2021-04-13 18:00 David Pike
3. 2021-04-13 21:40 Eric van der Veen
4. 2021-04-14 17:01 David Pike
5. 2021-04-14 19:35 Eric van der Veen
6. 2021-04-14 21:21 David Pike
7. 2021-04-17 16:08 Eric van der Veen
8. 2021-04-20 18:36 David Pike
9. 2021-04-20 20:24 Eric van der Veen

22 Apr 2021 – 22 Apr 2021 : Fulford Estate Collection - Online Auction Apr22-25

1. 2021-04-22 00:07 John Turanin
2. 2021-04-22 10:25 Eric van der Veen
3. 2021-04-22 14:52 Tony Oz

22 Apr 2021 – 23 Apr 2021 : Kaster Spherant

1. 2021-04-22 17:25 Rafael C. Caruso
2. 2021-04-23 08:53 Tony Oz

23 Apr 2021 – 23 Apr 2021 : Excellent talk on the Apollo 11 guidance computer

1. 2021-04-23 08:54 Bob Crawley

22 Apr 2021 – 23 Apr 2021 : Re: DIY Starfinder - a lockdown project

1. 2021-04-22 22:07 Tibor Miseta
2. 2021-04-23 11:03 Tony Oz

12 Apr 2021 – 23 Apr 2021 : Davis MK15 light mod possible?

1. 2021-04-12 19:14 Darcy Paul
2. 2021-04-20 05:07 Paul Dolkas
3. 2021-04-23 16:07 Paul Dolkas

25 Apr 2021 – 25 Apr 2021 : Sunday "Office Hours" session, 4pm Eastern (2000 UT)

1. 2021-04-25 02:30 Frank Reed

23 Apr 2021 – 25 Apr 2021 : Galilean eyepiece description?

1. 2021-04-23 21:41 Paul Saffo
2. 2021-04-23 23:25 Peter Monta
3. 2021-04-24 04:00 Bill Morris
4. 2021-04-24 19:51 Paul Saffo
5. 2021-04-25 05:20 Bill Morris
6. 2021-04-25 11:28 Peter Monta
7. 2021-04-25 20:53 Paul Saffo

27 Apr 2021 – 27 Apr 2021 : Papers by George H. Kaplan

1. 2021-04-27 09:03 Andrés Ruiz

06 Apr 2021 – 28 Apr 2021 : Time Sight and Ex-Meridian by Bygrave

1. 2021-04-06 09:49 Brian Walton
2. 2021-04-06 14:33 Greg Rudzinski
3. 2021-04-06 15:59 Tony Oz
4. 2021-04-06 23:07 Greg Rudzinski
5. 2021-04-07 07:56 Brian Walton
6. 2021-04-07 21:27 Lars Bergman
7. 2021-04-08 07:29 Tony Oz
8. 2021-04-08 12:56 Greg Rudzinski
9. 2021-04-28 16:11 Brian Walton

27 Apr 2021 – 28 Apr 2021 : Golden Globe Race -- how would you detect cheating?

1. 2021-04-27 10:29 Bill Lionheart
2. 2021-04-27 16:53 Greg Rudzinski
3. 2021-04-27 17:15 David Pike
4. 2021-04-27 18:58 David C
5. 2021-04-27 18:58 Frank Reed
6. 2021-04-27 22:11 Bob Goethe
7. 2021-04-28 07:41 Gary LaPook
8. 2021-04-28 08:33 Tony Oz
9. 2021-04-28 09:05 Bill Lionheart
10. 2021-04-28 17:37 Murray Buckman
11. 2021-04-28 18:38 Gary LaPook
12. 2021-04-28 18:43 Gary LaPook

28 Apr 2021 – 28 Apr 2021 : Michael Collins and the sextant on Apollo 11

1. 2021-04-28 21:05 Frank Reed

28 Apr 2021 – 29 Apr 2021 : Charles H Cotter's PhD Thesis

1. 2021-04-28 06:46 David C
2. 2021-04-28 08:35 Robert H. van Gent
3. 2021-04-29 04:16 David C

29 Apr 2021 – 29 Apr 2021 : No online "Office Hours" today

1. 2021-04-29 17:30 Frank Reed
2. 2021-04-29 18:00 Frank Reed

26 Apr 2021 – 30 Apr 2021 : Simex sextant

1. 2021-04-26 05:14 David C
2. 2021-04-26 14:41 Frank Reed
3. 2021-04-26 14:41 Alexandre Eremenko
4. 2021-04-26 15:17 Fred Hebard
5. 2021-04-26 16:56 Murray Buckman
6. 2021-04-26 19:47 David Pike
7. 2021-04-26 20:53 Bill Morris
8. 2021-04-27 02:43 David C
9. 2021-04-27 03:21 David C
10. 2021-04-29 02:32 Mike Burkes
11. 2021-04-30 05:04 Bill Morris

01 May 2021 – 01 May 2021 : C & P sextant

1. 2021-05-01 12:11 Noell Wilson

26 Apr 2021 – 01 May 2021 : Celestial Navigation article in Popular Mechanics

1. 2021-04-26 19:02 Frank Reed
2. 2021-05-01 13:01 Noell Wilson

30 Apr 2021 – 03 May 2021 : HarvardX offers free online course "PredictionX: Lost Without Longitude"

1. 2021-04-30 16:38 Ed Popko
2. 2021-04-30 21:11 Alan S
3. 2021-05-01 18:18 Ed Popko
4. 2021-05-02 02:24 Alan S
5. 2021-05-03 11:20 Ed Popko
6. 2021-05-03 16:15 Alan S

03 May 2021 – 03 May 2021 : Reconditioned Link A-12 Sextant F.S.

1. 2021-05-03 06:10 Robert Swartz
2. 2021-05-03 18:19 Art Leung

03 May 2021 – 06 May 2021 : Digital Aries clock

1. 2021-05-03 08:02 Herman Dekker
2. 2021-05-03 23:17 Sean C
3. 2021-05-04 10:51 Herman Dekker
4. 2021-05-04 11:40 Tony Oz
5. 2021-05-05 20:48 Gary LaPook
6. 2021-05-06 07:25 Herman Dekker

02 May 2021 – 07 May 2021 : DIY star-globe: advise needed

1. 2021-05-02 21:10 Tony Oz
2. 2021-05-03 10:48 David Pike
3. 2021-05-03 20:44 David Pike
4. 2021-05-04 08:17 Tony Oz
5. 2021-05-04 10:14 David Pike
6. 2021-05-07 10:37 David Pike

07 May 2021 – 08 May 2021 : Re: Silvering mirrors with mercury-tin amalgam

1. 2021-05-07 00:36 Bill Morris
2. 2021-05-07 14:13 Murray Buckman
3. 2021-05-08 07:40 Geoffrey Kolbe

08 May 2021 – 08 May 2021 : Re: 16 Astronomy eBooks for $18

1. 2021-05-08 08:54 David Pike

10 May 2021 – 11 May 2021 : Pub. 249 origins and history

1. 2021-05-10 04:56 Frank Reed
2. 2021-05-10 07:37 David C
3. 2021-05-10 09:16 David C
4. 2021-05-10 09:34 Ian Gifford
5. 2021-05-10 10:00 David Pike
6. 2021-05-10 22:33 David C
7. 2021-05-11 09:15 David Pike
8. 2021-05-11 09:20 David Pike

11 May 2021 – 12 May 2021 : Re: New Soviet era sextant SNO-T

1. 2021-05-11 12:26 Bernard N
2. 2021-05-11 19:09 Bruno Meier
3. 2021-05-12 13:20 Paul Bedel

12 May 2021 – 12 May 2021 : MapQuest and Google Maps geographic coordinates

1. 2021-05-12 13:21 Mike Burkes
2. 2021-05-12 20:08 David Pike

13 May 2021 – 14 May 2021 : The Moon is near the Mercury today (2021-05-13)

1. 2021-05-13 10:25 Tony Oz
2. 2021-05-14 08:18 Tony Oz

13 May 2021 – 14 May 2021 : 2102D improvements

1. 2021-05-13 08:50 Philippe Posth
2. 2021-05-13 17:08 Gary LaPook
3. 2021-05-14 10:33 Philippe Posth

09 May 2021 – 14 May 2021 : Online "Office Hours" today

1. 2021-05-09 11:59 David Pike
2. 2021-05-09 16:38 Frank Reed
3. 2021-05-14 15:36 Frank Reed

14 May 2021 – 14 May 2021 : Bygrave Slide Rule Emulator

1. 2021-05-14 17:16 Bill Ritchie

12 May 2021 – 15 May 2021 : The "ИМС-3": a clone of the SOLD KM2 octant

1. 2021-05-12 15:49 Tony Oz
2. 2021-05-13 08:05 Tony Oz
3. 2021-05-13 13:31 Jeffrey Rock
4. 2021-05-14 08:02 Tony Oz
5. 2021-05-15 03:43 Jeffrey Rock

17 May 2021 – 18 May 2021 : Do you recognize this?

1. 2021-05-17 01:38 Doug Faunt
2. 2021-05-17 06:02 Jürgen Hoefeld
3. 2021-05-17 08:35 David Pike
4. 2021-05-17 09:36 Gary LaPook
5. 2021-05-17 09:47 Gary LaPook
6. 2021-05-17 09:51 Gary LaPook
7. 2021-05-17 10:05 Gary LaPook
8. 2021-05-17 14:10 Doug Faunt
9. 2021-05-17 14:55 David Pike
10. 2021-05-17 14:58 Doug Faunt
11. 2021-05-17 15:10 Doug Faunt
12. 2021-05-17 21:41 Gary LaPook
13. 2021-05-17 22:08 Doug Faunt
14. 2021-05-18 07:00 Gary LaPook
15. 2021-05-18 13:00 Art Leung

18 May 2021 – 18 May 2021 : Set of Nautical Almanacs

1. 2021-05-18 13:56 Bob Peterson

15 May 2021 – 18 May 2021 : NavList website and cookies

1. 2021-05-15 02:22 Alan S
2. 2021-05-15 06:46 David Pike
3. 2021-05-15 17:52 Frank Reed
4. 2021-05-17 18:02 Alan S
5. 2021-05-18 06:36 Sean C
6. 2021-05-18 23:29 Alan S

19 May 2021 – 19 May 2021 : Re: CN Aboard Commercial Flight

1. 2021-05-19 02:33 Alan S
2. 2021-05-19 12:24 James F Campbell

18 May 2021 – 19 May 2021 : Re: AH: windproof shades material

1. 2021-05-18 13:01 Igor S.
2. 2021-05-18 18:41 Modris Fersters
3. 2021-05-19 23:00 Igor S.

20 May 2021 – 20 May 2021 : Ukrainian capt. on CN

1. 2021-05-20 09:34 Igor S.

20 May 2021 – 20 May 2021 : Pierce camera sextant

1. 2021-05-20 18:46 Frank Reed

19 May 2021 – 21 May 2021 : Air Force One sextant?

1. 2021-05-19 21:59 Frank Reed
2. 2021-05-19 23:26 Lu Abel
3. 2021-05-20 00:19 Don Seltzer
4. 2021-05-20 02:45 Frank Reed
5. 2021-05-20 03:09 Robert VanderPol II
6. 2021-05-20 03:20 Jeffrey Rock
7. 2021-05-20 05:36 Sean C
8. 2021-05-20 05:38 Sean C
9. 2021-05-20 07:39 Gary LaPook
10. 2021-05-20 08:34 Sean C
11. 2021-05-21 03:58 Gary LaPook
12. 2021-05-21 08:51 David Pike
13. 2021-05-21 09:59 Sean C
14. 2021-05-21 14:23 David Iwancio

21 May 2021 – 21 May 2021 : Altitude with artificial hirizon

1. 2021-05-21 14:28 Doug Faunt
2. 2021-05-21 17:18 Greg Herdt

21 May 2021 – 21 May 2021 : The anti-Maskelyne POV

1. 2021-05-21 17:57 Frank Reed

21 May 2021 – 22 May 2021 : Re: Altitude with artificial horizon

1. 2021-05-21 17:11 Frank Reed
2. 2021-05-21 17:27 John Clements
3. 2021-05-21 17:38 Frank Reed
4. 2021-05-21 18:54 Doug Faunt
5. 2021-05-21 18:55 Gary LaPook
6. 2021-05-21 19:05 Gary LaPook
7. 2021-05-21 19:40 Greg Herdt
8. 2021-05-22 02:02 Frank Reed

23 May 2021 – 23 May 2021 : No Office Hours today

1. 2021-05-23 16:28 Frank Reed

24 May 2021 – 24 May 2021 : CogNav Webinar Series: Star Wars Cities

1. 2021-05-24 10:04 David Pike

24 May 2021 – 25 May 2021 : Three GPS data comparison: All different. Huh?

1. 2021-05-24 17:55 Mark Coady
2. 2021-05-24 22:41 Frank Reed
3. 2021-05-25 15:59 David Pike

22 May 2021 – 25 May 2021 : Universal Plotting Sheet and Weir diagram

1. 2021-05-22 14:04 Bela Kovacs
2. 2021-05-22 18:50 Greg Rudzinski
3. 2021-05-23 08:46 Herman Dekker
4. 2021-05-23 19:07 Gary LaPook
5. 2021-05-23 19:10 John Niven
6. 2021-05-23 22:19 Bela Kovacs
7. 2021-05-24 08:33 Herman Dekker
8. 2021-05-24 08:40 David Pike
9. 2021-05-24 10:05 Bela Kovacs
10. 2021-05-24 18:22 Gary LaPook
11. 2021-05-25 10:58 Bela Kovacs
12. 2021-05-25 19:34 Willi Strohl

25 May 2021 – 25 May 2021 : London hospital employs internal navigation

1. 2021-05-25 16:05 David Pike
2. 2021-05-25 16:20 Frank Reed
3. 2021-05-25 22:10 Robert VanderPol II

27 May 2021 – 27 May 2021 : Re: Off topic - Fatality /more

1. 2021-05-27 20:49 john deam

27 May 2021 – 27 May 2021 : Flight Surgeon death aboard KC-135A

1. 2021-05-27 21:18 john deam

28 May 2021 – 28 May 2021 : Conversion of Mark IX bubble sextant to surface use.

1. 2021-05-28 00:59 Bill Morris

26 May 2021 – 28 May 2021 : Navigational significance of just a curiosity?

1. 2021-05-26 22:58 David C
2. 2021-05-27 00:07 Bob Goethe
3. 2021-05-27 21:33 David C
4. 2021-05-27 22:29 Frank Reed
5. 2021-05-28 04:46 David C

28 May 2021 – 28 May 2021 : Today: Online "Office Hours"

1. 2021-05-28 15:53 Frank Reed

29 May 2021 – 29 May 2021 : More games with GPS and AIS positions

1. 2021-05-29 22:00 Frank Reed

01 Jun 2021 – 01 Jun 2021 : Re: Coast Navigation School

1. 2021-06-01 01:27 Patrick Barclay
2. 2021-06-01 05:43 Frank Reed

29 May 2021 – 01 Jun 2021 : Stick shadows and sundial curves

1. 2021-05-29 21:46 Frank Reed
2. 2021-05-30 23:02 Frank Reed
3. 2021-05-31 12:41 Adrian F
4. 2021-05-31 14:43 Tony Oz
5. 2021-06-01 12:12 Adrian F
6. 2021-06-01 17:46 Frank Reed

01 Jun 2021 – 01 Jun 2021 : NASA Astronomy Photo of the Day: satellite trails

1. 2021-06-01 22:40 Frank Reed

18 May 2021 – 02 Jun 2021 : Ken Gebhart obituary

1. 2021-05-18 18:06 Frank Reed
2. 2021-05-18 18:17 Greg Rudzinski
3. 2021-05-18 18:38 John Carbone
4. 2021-05-18 18:56 Michael Cain
5. 2021-05-19 05:26 Sean C
6. 2021-05-19 05:58 Jean-Philippe Planas
7. 2021-05-19 17:58 Bob Peterson
8. 2021-05-19 19:58 Hewitt Schlereth
9. 2021-05-19 22:10 Charles McElhill
10. 2021-05-20 00:02 Alan S
11. 2021-05-20 07:23 Gary LaPook
12. 2021-05-23 17:49 Gary LaPook
13. 2021-06-02 19:40 Frank Reed

02 Jun 2021 – 02 Jun 2021 : Practice Problems for Tables Methods?

1. 2021-06-02 00:04 Steve Ward
2. 2021-06-02 00:39 Frank Reed
3. 2021-06-02 01:16 John Clements
4. 2021-06-02 05:41 Sean C
5. 2021-06-02 13:10 Steve Ward
6. 2021-06-02 13:11 Steve Ward
7. 2021-06-02 14:28 David Pike
8. 2021-06-02 19:51 Dave Walden
9. 2021-06-02 23:08 Steve Ward

21 May 2021 – 03 Jun 2021 : NASR question on large F values

1. 2021-05-21 10:06 John Pinto
2. 2021-05-21 16:59 David Iwancio
3. 2021-05-21 19:41 John Pinto
4. 2021-05-22 02:37 John Pinto
5. 2021-05-23 17:29 Gary LaPook
6. 2021-05-23 18:03 Bruce Cutting
7. 2021-05-24 08:54 David Pike
8. 2021-05-27 23:47 John Pinto
9. 2021-06-03 09:30 David Iwancio
10. 2021-06-03 20:52 John Pinto

04 Jun 2021 – 04 Jun 2021 : Correction: Results of the sunclock experiment

1. 2021-06-04 10:32 Geoffrey Kolbe

03 Jun 2021 – 05 Jun 2021 : Naval Observatory website change

1. 2021-06-03 20:55 John Pinto
2. 2021-06-04 04:54 Dave Walden
3. 2021-06-04 16:05 Alan S
4. 2021-06-05 01:55 Dave Walden

04 Jun 2021 – 05 Jun 2021 : Eclipse Fix

1. 2021-06-04 18:55 Frank Reed
2. 2021-06-05 19:42 Ed Popko

05 Jun 2021 – 05 Jun 2021 : Shade needs to be glued back in on C+P sextant

1. 2021-06-05 18:08 Fred Hebard
2. 2021-06-05 19:59 Greg Rudzinski
3. 2021-06-05 21:11 Peter Monta

03 Jun 2021 – 06 Jun 2021 : Relativistic interstellar navigation (or how to avoid getting Lost in Space!)

1. 2021-06-03 18:26 Paul Saffo
2. 2021-06-03 20:09 Frank Reed
3. 2021-06-04 05:29 Sean C
4. 2021-06-06 00:15 Frank Reed
5. 2021-06-06 11:36 David Pike

04 Jun 2021 – 06 Jun 2021 : Results of the sunclock experiment

1. 2021-06-04 08:40 Geoffrey Kolbe
2. 2021-06-04 11:02 Jim Rives
3. 2021-06-04 14:24 Steve Ward
4. 2021-06-04 15:14 Tony Oz
5. 2021-06-04 18:19 David Pike
6. 2021-06-04 22:14 David C
7. 2021-06-05 05:30 Peter Monta
8. 2021-06-05 07:40 Geoffrey Kolbe
9. 2021-06-05 07:56 David Pike
10. 2021-06-05 14:59 Geoffrey Kolbe
11. 2021-06-05 15:09 Peter Monta
12. 2021-06-05 17:53 Geoffrey Kolbe
13. 2021-06-06 08:41 David Pike
14. 2021-06-06 11:45 David Pike

06 Jun 2021 – 06 Jun 2021 : Sorry, no "Office Hours" today

1. 2021-06-06 17:07 Frank Reed

07 Jun 2021 – 07 Jun 2021 : Watch set to UT options

1. 2021-06-07 12:55 Art Leung

10 Jun 2021 – 11 Jun 2021 : Re: Kollsman periscopic sextant mount

1. 2021-06-10 19:06 Luis A. Loeff
2. 2021-06-10 21:12 David Pike
3. 2021-06-11 00:13 Gary LaPook
4. 2021-06-11 08:45 David Pike

12 Jun 2021 – 12 Jun 2021 : Re: Bob Goethe's Mark 2 Navigators slide rule, test drive comparisons.

1. 2021-06-12 03:18 Darcy Paul

06 Jun 2021 – 12 Jun 2021 : Sunclock apparatus

1. 2021-06-06 13:21 Geoffrey Kolbe
2. 2021-06-12 12:56 Ed Popko

13 Jun 2021 – 13 Jun 2021 : Civil War general, presidential candidate, lunarian

1. 2021-06-13 05:46 Frank Reed

16 Jun 2021 – 17 Jun 2021 : 'Great Dimming' of Betelgeuse solved

1. 2021-06-16 20:41 David Pike
2. 2021-06-16 20:48 Frank Reed
3. 2021-06-17 14:31 David Pike

13 Jun 2021 – 17 Jun 2021 : Heath Hezzanith?

1. 2021-06-13 21:28 Hewitt Schlereth
2. 2021-06-15 07:29 David C
3. 2021-06-16 15:25 Hewitt Schlereth
4. 2021-06-16 17:21 Al Stewart
5. 2021-06-17 05:50 David C
6. 2021-06-17 21:01 Hewitt Schlereth
7. 2021-06-17 21:06 Hewitt Schlereth

17 Jun 2021 – 17 Jun 2021 : Old links for NavList

1. 2021-06-17 21:56 Frank Reed

12 Jun 2021 – 18 Jun 2021 : Sextant experiment

1. 2021-06-12 14:34 Modris Fersters
2. 2021-06-13 13:38 Peter Monta
3. 2021-06-13 20:34 Modris Fersters
4. 2021-06-14 18:52 Bill B
5. 2021-06-17 20:12 Peter Monta
6. 2021-06-18 14:00 Modris Fersters

11 Jun 2021 – 18 Jun 2021 : Bill Morris' MHR1 reproduction

1. 2021-06-11 23:58 Art Leung
2. 2021-06-12 08:38 Gary LaPook
3. 2021-06-12 08:42 Gary LaPook
4. 2021-06-12 09:03 Gary LaPook
5. 2021-06-12 14:02 Geoffrey Kolbe
6. 2021-06-12 20:45 Gary LaPook
7. 2021-06-12 22:16 Bill Ritchie
8. 2021-06-13 03:02 Francis Upchurch
9. 2021-06-13 06:37 Francis Upchurch
10. 2021-06-13 09:33 Gary LaPook
11. 2021-06-13 09:58 Tony Oz
12. 2021-06-13 21:56 Bill Ritchie
13. 2021-06-14 07:40 Wolfgang Hasper
14. 2021-06-15 20:01 Art Leung
15. 2021-06-16 11:09 Wolfgang Hasper
16. 2021-06-16 13:47 Robin Stuart
17. 2021-06-18 15:02 Noell Wilson

15 Jun 2021 – 19 Jun 2021 : Re: Borrowed Bygrave

1. 2021-06-15 09:13 Steve Gillion
2. 2021-06-16 04:00 Francis Upchurch
3. 2021-06-16 06:30 David Pike
4. 2021-06-16 11:11 Wolfgang Hasper
5. 2021-06-16 14:41 Francis Upchurch
6. 2021-06-16 20:27 David Pike
7. 2021-06-18 03:07 Brian Walton
8. 2021-06-18 09:47 David Pike
9. 2021-06-19 04:38 Brian Walton

19 Jun 2021 – 19 Jun 2021 : Artificial Horizon

1. 2021-06-19 08:36 Enrique Petero

19 Jun 2021 – 19 Jun 2021 : Hadley Quadrant - Gilbert - Tower on the Hill - 1771

1. 2021-06-19 14:34 Jim Rives

18 Jun 2021 – 19 Jun 2021 : My Kollsman sextant.

1. 2021-06-18 17:32 Doug Faunt
2. 2021-06-18 20:50 David Pike
3. 2021-06-19 05:18 Gary LaPook
4. 2021-06-19 07:37 David Pike
5. 2021-06-19 20:56 Paul Hirose

21 Jun 2021 – 21 Jun 2021 : International Aeradio Ltd Calculation Servce

1. 2021-06-21 00:04 David C

21 Jun 2021 – 21 Jun 2021 : Re: Altitude correction using Artificial Horizon?

1. 2021-06-21 08:08 Enrique Petero
2. 2021-06-21 17:08 David Pike

12 Jun 2021 – 22 Jun 2021 : How many ways to define a day?

1. 2021-06-12 02:30 Frank Reed
2. 2021-06-12 11:44 Matus Tejiscak
3. 2021-06-13 03:15 Frank Reed
4. 2021-06-14 14:06 Peter Monta
5. 2021-06-15 22:31 Frank Reed
6. 2021-06-16 06:46 Geoffrey Kolbe
7. 2021-06-16 20:20 Dave Walden
8. 2021-06-16 23:06 Matus Tejiscak
9. 2021-06-22 15:57 Frank Reed
10. 2021-06-22 16:59 Frank Reed
11. 2021-06-22 17:43 Frank Reed

22 Jun 2021 – 22 Jun 2021 : Re: Mechanical Maneuvering Board instructions

1. 2021-06-22 14:45 TR Proven
2. 2021-06-22 16:48 David Pike
3. 2021-06-22 18:07 Gary LaPook
4. 2021-06-22 18:26 Gary LaPook

20 Jun 2021 – 22 Jun 2021 : Re: International star name pronunciations

1. 2021-06-20 17:13 Frank Reed
2. 2021-06-20 20:26 David Pike
3. 2021-06-20 21:10 Benjamin Lowings
4. 2021-06-20 21:47 Gary LaPook
5. 2021-06-20 22:03 David C
6. 2021-06-20 22:11 Bill Ritchie
7. 2021-06-20 22:15 David C
8. 2021-06-20 22:47 David C
9. 2021-06-20 23:27 David Pike
10. 2021-06-21 02:35 Peter Hakel
11. 2021-06-22 04:30 Bill Morris
12. 2021-06-22 08:02 David Pike
13. 2021-06-22 08:51 John Pinto
14. 2021-06-22 18:29 Frank Reed

02 Jun 2021 – 22 Jun 2021 : Help required with a sunclock experiment

1. 2021-06-02 07:53 Geoffrey Kolbe
2. 2021-06-02 15:06 Frank Reed
3. 2021-06-02 16:57 David Pike
4. 2021-06-02 17:57 Geoffrey Kolbe
5. 2021-06-02 18:14 Geoffrey Kolbe
6. 2021-06-02 18:22 Frank Reed
7. 2021-06-02 19:12 Michael Cain
8. 2021-06-03 05:00 Geoffrey Kolbe
9. 2021-06-03 15:09 Joseph Rheubeck
10. 2021-06-22 21:28 Chris Post

02 Jun 2021 – 24 Jun 2021 : Problem Practice (group project)

1. 2021-06-02 23:57 Steve Ward
2. 2021-06-03 01:57 Frank Reed
3. 2021-06-03 02:22 Steve Ward
4. 2021-06-03 09:49 David Pike
5. 2021-06-03 12:08 Paul Jackson
6. 2021-06-03 14:30 Greg Rudzinski
7. 2021-06-03 15:20 David Pike
8. 2021-06-03 21:01 Nick M
9. 2021-06-03 21:47 Frank Reed
10. 2021-06-03 22:43 Greg Rudzinski
11. 2021-06-04 14:06 Steve Ward
12. 2021-06-04 14:10 Steve Ward
13. 2021-06-04 17:29 Frank Reed
14. 2021-06-04 18:16 max mulhern
15. 2021-06-04 18:37 Frank Reed
16. 2021-06-04 19:24 max mulhern
17. 2021-06-04 21:55 Murray Buckman
18. 2021-06-04 22:26 Steve Ward
19. 2021-06-22 15:50 Frank Reed
20. 2021-06-24 09:55 Sean C

23 Jun 2021 – 24 Jun 2021 : Re: Prob 1/4 of being in a cocked hat

1. 2021-06-23 15:38 Robin Stuart
2. 2021-06-23 15:54 Frank Reed
3. 2021-06-23 19:10 Gary LaPook
4. 2021-06-24 11:32 Geoffrey Kolbe

21 Jun 2021 – 24 Jun 2021 : Solstice

1. 2021-06-21 01:42 Frank Reed
2. 2021-06-21 04:05 Paul Saffo
3. 2021-06-21 04:13 David C
4. 2021-06-21 04:59 David C
5. 2021-06-21 05:25 David C
6. 2021-06-21 07:12 David C
7. 2021-06-22 19:21 Frank Reed
8. 2021-06-23 06:02 Frank Reed
9. 2021-06-23 10:40 Fred Hebard
10. 2021-06-24 18:54 Hewitt Schlereth

24 Jun 2021 – 25 Jun 2021 : June 24, 1178: Today in History

1. 2021-06-24 13:32 Bob Goethe
2. 2021-06-24 19:39 Frank Reed
3. 2021-06-25 13:29 Robin Stuart

26 Jun 2021 – 26 Jun 2021 : ADMIN: Expect outages over the next 18 hours

1. 2021-06-26 03:10 Frank Reed

25 Jun 2021 – 29 Jun 2021 : Milky Way photo navigation challenge

1. 2021-06-25 19:06 Frank Reed
2. 2021-06-25 20:57 Robin Stuart
3. 2021-06-26 23:17 Frank Reed
4. 2021-06-27 19:46 Russell D. Sampson
5. 2021-06-27 19:48 Russell D. Sampson
6. 2021-06-27 20:37 Frank Reed
7. 2021-06-27 21:19 Robert H. van Gent
8. 2021-06-27 22:24 Murray Buckman
9. 2021-06-27 23:45 Frank Reed
10. 2021-06-28 05:11 Frank Reed
11. 2021-06-28 18:49 Robin Stuart
12. 2021-06-28 23:02 Matus Tejiscak
13. 2021-06-29 00:49 Frank Reed
14. 2021-06-29 02:16 Frank Reed
15. 2021-06-29 14:19 Robin Stuart

25 Jun 2021 – 30 Jun 2021 : Uk data

1. 2021-06-25 13:53 Dave Walden
2. 2021-06-25 16:04 Bruce J. Pennino
3. 2021-06-25 19:07 Gary LaPook
4. 2021-06-25 20:25 Frank Reed
5. 2021-06-27 04:50 Geoffrey Kolbe
6. 2021-06-28 05:30 Paul Hirose
7. 2021-06-29 21:37 David C
8. 2021-06-30 07:41 David Pike
9. 2021-06-30 14:18 Dustin Baenen
10. 2021-06-30 17:03 Frank Reed

30 Jun 2021 – 30 Jun 2021 : Russian data

1. 2021-06-30 20:11 Dave Walden

30 Jun 2021 – 01 Jul 2021 : Moonlight and Visible Horizon

1. 2021-06-30 20:11 Guus Dekker
2. 2021-06-30 22:43 Gary LaPook
3. 2021-06-30 23:00 Frank Reed
4. 2021-07-01 06:15 Guus Dekker

01 Jul 2021 – 01 Jul 2021 : Time for navigation

1. 2021-07-01 12:03 Dave Walden

02 Jul 2021 – 02 Jul 2021 : Airborne CelNav demo Flight Simulator - the Earhart Howland flight

1. 2021-07-02 05:53 Eric van der Veen
2. 2021-07-02 08:36 Gary LaPook
3. 2021-07-02 12:25 Eric van der Veen

02 Jul 2021 – 02 Jul 2021 : Dawn Sight For Minimalists

1. 2021-07-02 20:51 Michael Bradley

22 Jun 2021 – 05 Jul 2021 : A-5 Course and Distance Computer

1. 2021-06-22 16:33 David L Masters
2. 2021-06-28 18:16 David Pike
3. 2021-06-28 23:27 Gary LaPook
4. 2021-06-28 23:42 Gary LaPook
5. 2021-06-28 23:52 Gary LaPook
6. 2021-06-29 02:09 Gary LaPook
7. 2021-06-29 02:34 Gary LaPook
8. 2021-06-29 04:11 Gary LaPook
9. 2021-06-29 04:16 Gary LaPook
10. 2021-06-29 08:15 Gary LaPook
11. 2021-06-29 10:31 Dave Walden
12. 2021-06-29 10:48 David Pike
13. 2021-06-29 12:06 David Pike
14. 2021-06-29 13:18 Peter Hakel
15. 2021-06-29 14:53 David L Masters
16. 2021-06-29 21:49 Gary LaPook
17. 2021-06-29 21:51 Gary LaPook
18. 2021-06-29 21:52 Gary LaPook
19. 2021-06-30 05:16 Sean C
20. 2021-06-30 15:03 David L Masters
21. 2021-06-30 16:24 Frank Reed
22. 2021-06-30 16:59 David Pike
23. 2021-06-30 18:40 Gary LaPook
24. 2021-07-01 13:24 David Pike
25. 2021-07-02 04:06 Gary LaPook
26. 2021-07-02 08:59 David Pike
27. 2021-07-02 15:17 Alan S
28. 2021-07-02 18:16 Hewitt Schlereth
29. 2021-07-02 23:18 Alan S
30. 2021-07-03 03:50 Dave Walden
31. 2021-07-03 06:48 David Pike
32. 2021-07-03 23:23 Alan S
33. 2021-07-04 00:33 Frank Reed
34. 2021-07-04 02:32 Alan S
35. 2021-07-04 02:39 Alan S
36. 2021-07-04 03:23 Frank Reed
37. 2021-07-04 04:36 David C
38. 2021-07-04 19:10 Gary LaPook
39. 2021-07-04 20:39 David Pike
40. 2021-07-05 05:29 Gary LaPook

05 Jul 2021 – 05 Jul 2021 : Artificial horizons for sale

1. 2021-07-05 08:19 Gary LaPook

05 Jul 2021 – 05 Jul 2021 : Observational Twilight

1. 2021-07-05 10:23 Robert H. van Gent
2. 2021-07-05 14:33 Greg Rudzinski
3. 2021-07-05 15:45 Frank Reed
4. 2021-07-05 18:32 Gary LaPook
5. 2021-07-05 19:48 Robert H. van Gent

05 Jul 2021 – 07 Jul 2021 : Guy Murchie?

1. 2021-07-05 04:01 Tok Harnish
2. 2021-07-05 07:26 Eric van der Veen
3. 2021-07-05 08:24 Gary LaPook
4. 2021-07-05 08:27 Gary LaPook
5. 2021-07-05 13:55 Tok Harnish
6. 2021-07-05 15:02 Frank Reed
7. 2021-07-05 18:02 Tom Harnish
8. 2021-07-05 18:32 Gary LaPook
9. 2021-07-07 14:13 Wolfgang Köberer

18 Jun 2021 – 09 Jul 2021 : Moon horns as compass

1. 2021-06-18 17:08 Frank Reed
2. 2021-07-09 18:36 Bill Ritchie

07 Jul 2021 – 09 Jul 2021 : Re: Found sextant at local curiosity shop...

1. 2021-07-07 21:02 Alan S
2. 2021-07-09 19:49 Hewitt Schlereth
3. 2021-07-09 21:59 Alan S

10 Jul 2021 – 10 Jul 2021 : Sun SD comparison photos

1. 2021-07-10 12:04 Frank Reed
2. 2021-07-10 19:41 Herman Dekker
3. 2021-07-10 21:04 Frank Reed

07 Jul 2021 – 10 Jul 2021 : Re: Lunars in history

1. 2021-07-07 20:20 Tom Harnish
2. 2021-07-08 00:49 Frank Reed
3. 2021-07-10 22:48 Tom Harnish

11 Jul 2021 – 11 Jul 2021 : John Karl contact info?

1. 2021-07-11 16:27 John Pinto

12 Jul 2021 – 12 Jul 2021 : "GPS Anti Spoof" app for Sextant Calibration

1. 2021-07-12 15:41 Dustin Baenen

12 Jul 2021 – 13 Jul 2021 : Evolution of the Flat Bygrave

1. 2021-07-12 14:45 Robin Stuart
2. 2021-07-13 09:09 Wolfgang Hasper
3. 2021-07-13 12:34 Art Leung

15 Jul 2021 – 15 Jul 2021 : Day vs night map coverage

1. 2021-07-15 01:37 Doug Faunt

05 Jul 2021 – 15 Jul 2021 : Recording sextant (maybe octant)?

1. 2021-07-05 14:17 Tom Harnish
2. 2021-07-09 08:45 Eric van der Veen
3. 2021-07-09 16:59 David Pike
4. 2021-07-09 19:24 Gary LaPook
5. 2021-07-09 19:27 Gary LaPook
6. 2021-07-10 11:06 Gary LaPook
7. 2021-07-10 15:19 David Pike
8. 2021-07-11 13:53 Noell Wilson
9. 2021-07-14 03:06 Gary LaPook
10. 2021-07-14 20:41 Tom Harnish
11. 2021-07-15 04:56 Gary LaPook

15 Jul 2021 – 16 Jul 2021 : Fwd: Announcement of new update American Practical Navigator Pub. 9

1. 2021-07-15 17:00 Doug Faunt
2. 2021-07-16 13:29 Jeremy C

17 Jul 2021 – 17 Jul 2021 : An interesting sundial

1. 2021-07-17 13:19 David Pike

17 Jul 2021 – 17 Jul 2021 : An amazing reflection

1. 2021-07-17 14:31 David Pike
2. 2021-07-17 19:35 Gary LaPook

11 Jul 2021 – 18 Jul 2021 : Selling an A-12 bubble sextant

1. 2021-07-11 15:25 Geoffrey Kolbe
2. 2021-07-11 17:24 David Pike
3. 2021-07-11 17:27 Ed Popko
4. 2021-07-11 22:24 David C
5. 2021-07-12 04:59 Geoffrey Kolbe
6. 2021-07-12 15:35 Matus Tejiscak
7. 2021-07-13 13:24 Geoffrey Kolbe
8. 2021-07-18 00:53 Robert Swartz

18 Jul 2021 – 18 Jul 2021 : Milky Way photo or fake?

1. 2021-07-18 20:37 Frank Reed

20 Jul 2021 – 20 Jul 2021 : Dip from the deep blue origin

1. 2021-07-20 13:02 Frank Reed
2. 2021-07-20 14:08 David Pike
3. 2021-07-20 14:36 Alexandre Eremenko
4. 2021-07-20 15:37 Peter Monta

24 Jul 2021 – 24 Jul 2021 : Average Sun SD

1. 2021-07-24 17:29 Frank Reed

20 Jul 2021 – 24 Jul 2021 : An azimuth formula that works everywhere? Even on poles?

1. 2021-07-20 16:42 Tony Oz
2. 2021-07-20 17:54 David Pike
3. 2021-07-20 19:09 David Iwancio
4. 2021-07-20 20:18 David Pike
5. 2021-07-20 22:04 David Fleming
6. 2021-07-21 12:45 Tony Oz
7. 2021-07-21 18:45 Robin Stuart
8. 2021-07-21 22:16 Gary LaPook
9. 2021-07-21 22:20 Gary LaPook
10. 2021-07-22 09:31 Matus Tejiscak
11. 2021-07-22 12:07 Tony Oz
12. 2021-07-22 12:28 Dave Walden
13. 2021-07-22 15:07 David Pike
14. 2021-07-23 07:50 David Pike
15. 2021-07-23 08:35 David Pike
16. 2021-07-23 17:34 Robin Stuart
17. 2021-07-23 20:48 David Pike
18. 2021-07-24 07:58 Geoffrey Kolbe
19. 2021-07-24 14:01 Robin Stuart
20. 2021-07-24 14:14 David Pike
21. 2021-07-24 20:15 David Pike

27 Jul 2021 – 27 Jul 2021 : Checking Cargo Ship Compass Error With The Sun Life At Sea video

1. 2021-07-27 13:41 John Carbone

27 Jul 2021 – 27 Jul 2021 : StarFinder Epoch

1. 2021-07-27 17:30 John Pinto
2. 2021-07-27 18:12 Alexandre Eremenko
3. 2021-07-27 18:14 Frank Reed

26 Jul 2021 – 27 Jul 2021 : Re: Sextant experiment

1. 2021-07-26 00:30 Peter Monta
2. 2021-07-27 18:58 Modris Fersters
3. 2021-07-27 20:46 Peter Monta

27 Jun 2021 – 29 Jul 2021 : Re: Davis MK15 light mod possible?

1. 2021-06-27 00:47 Darcy Paul
2. 2021-06-27 00:50 Darcy Paul
3. 2021-07-08 05:45 Paul Dolkas
4. 2021-07-12 03:44 Paul Dolkas
5. 2021-07-29 04:18 Paul Dolkas

29 Jul 2021 – 29 Jul 2021 : Bubble size and accuracy

1. 2021-07-29 11:14 Tom Hope
2. 2021-07-29 15:52 David Pike

30 Jul 2021 – 30 Jul 2021 : Re: Calculators

1. 2021-07-30 16:20 Tudor Jones

30 Jul 2021 – 30 Jul 2021 : "Traditional" flat Bygrave

1. 2021-07-30 22:13 Tibor Miseta

01 Aug 2021 – 01 Aug 2021 : Altitude accuracy effect on cleared lunar distance

1. 2021-08-01 14:30 Modris Fersters
2. 2021-08-01 17:05 Modris Fersters

01 Aug 2021 – 02 Aug 2021 : Wired: Phantom Warships Are Courting Chaos in Conflict Zones

1. 2021-08-01 12:54 Paul Saffo
2. 2021-08-02 08:24 Jeremy C

31 Jul 2021 – 02 Aug 2021 : John Franklin lunar from 1818 and Mendoza y Rios method

1. 2021-07-31 16:04 Modris Fersters
2. 2021-07-31 19:36 Frank Reed
3. 2021-08-01 14:02 Modris Fersters
4. 2021-08-02 11:20 Dave Walden

05 Aug 2021 – 07 Aug 2021 : ADMIN: NavList Operations Contributions

1. 2021-08-05 23:47 Frank Reed
2. 2021-08-06 00:27 Richard Toohey
3. 2021-08-07 21:12 David C
4. 2021-08-07 21:21 Huub Robroek

08 Aug 2021 – 08 Aug 2021 : Unexpected star gazing reminder.

1. 2021-08-08 21:59 David Pike

06 Aug 2021 – 08 Aug 2021 : Degree sign in Windows

1. 2021-08-06 16:03 Frank Reed
2. 2021-08-06 21:43 Bill Ritchie
3. 2021-08-07 01:13 Sean C
4. 2021-08-07 07:10 Herman Dekker
5. 2021-08-07 08:26 Carsten John
6. 2021-08-07 09:32 John Niven
7. 2021-08-07 16:37 John Niven
8. 2021-08-08 13:21 Herman Dekker
9. 2021-08-08 14:18 Frank Reed
10. 2021-08-08 15:38 Carsten John
11. 2021-08-08 18:42 John Niven
12. 2021-08-08 20:20 Frank Reed
13. 2021-08-08 20:51 John Niven
14. 2021-08-08 21:03 Frank Reed
15. 2021-08-08 21:45 David Pike
16. 2021-08-08 23:42 David C

09 Aug 2021 – 09 Aug 2021 : SR-71 Astroinertial Navigation System

1. 2021-08-09 15:36 Sean C

16 Jul 2021 – 09 Aug 2021 : HO 249 Volume 1 Selected Stars Epoch 2000

1. 2021-07-16 22:13 John Pinto
2. 2021-07-17 02:30 Marcelo S
3. 2021-07-17 02:57 Frank Reed
4. 2021-07-17 04:33 Gary LaPook
5. 2021-07-17 12:30 John Pinto
6. 2021-07-17 12:31 John Pinto
7. 2021-08-09 16:42 Dominique Prinet

09 Aug 2021 – 09 Aug 2021 : Aries symbols experiment

1. 2021-08-09 18:54 Carsten John

09 Aug 2021 – 11 Aug 2021 : Outlook time zones

1. 2021-08-09 13:31 Art Leung
2. 2021-08-10 02:49 Sean C
3. 2021-08-11 15:14 Art Leung

11 Aug 2021 – 11 Aug 2021 : Re: A-12 Bubble Sextant (Octant)

1. 2021-08-11 16:41 Noell Wilson

10 Aug 2021 – 11 Aug 2021 : Navigation Symbols in Unicode

1. 2021-08-10 00:06 David C
2. 2021-08-10 08:15 David Pike
3. 2021-08-10 09:07 Carsten John
4. 2021-08-11 02:49 David C
5. 2021-08-11 19:15 Frank Reed

09 Aug 2021 – 11 Aug 2021 : Kollsman periscopic sextant aircraft mount to offer

1. 2021-08-09 16:11 Werner Luehmann
2. 2021-08-11 19:22 Werner Luehmann

15 Aug 2021 – 15 Aug 2021 : Astrolabium & nest

1. 2021-08-15 13:01 Igor S.

16 Aug 2021 – 17 Aug 2021 : 27th Meeting of Researchers of Slide Rules

1. 2021-08-16 04:10 Sean C
2. 2021-08-17 02:21 Alan S
3. 2021-08-17 03:12 Frank Reed
4. 2021-08-17 04:02 Alan S

17 Aug 2021 – 20 Aug 2021 : Willmann-Bell astronomical publications

1. 2021-08-17 04:21 Frank Reed
2. 2021-08-20 03:52 Peter Monta
3. 2021-08-20 14:11 John Clements
4. 2021-08-20 20:26 Rafael C. Caruso

20 Aug 2021 – 20 Aug 2021 : Sperry Gyrocompass MK 22

1. 2021-08-20 20:59 Alejandro Purgue

10 Aug 2021 – 21 Aug 2021 : New member

1. 2021-08-10 13:26 Stuart T
2. 2021-08-10 17:06 Robert VanderPol II
3. 2021-08-10 17:18 Stuart T
4. 2021-08-11 02:29 John Clements
5. 2021-08-11 09:17 Jeremy C
6. 2021-08-11 13:16 Stuart T
7. 2021-08-11 14:40 Stuart T
8. 2021-08-21 12:18 Terry Syrokosz

22 Aug 2021 – 22 Aug 2021 : Interesting: Air Almanac History

1. 2021-08-22 17:28 Doug Faunt
2. 2021-08-22 22:34 David C

22 Aug 2021 – 26 Aug 2021 : Tropical Storm Henri

1. 2021-08-22 20:21 Dave Walden
2. 2021-08-22 23:43 Frank Reed
3. 2021-08-23 05:57 David C
4. 2021-08-24 07:26 Jeremy C
5. 2021-08-25 14:16 Greg Rudzinski
6. 2021-08-26 15:23 Peter Smith

28 Aug 2021 – 28 Aug 2021 : Cheapest Scientific Calculator

1. 2021-08-28 07:57 Herman Dekker

18 Aug 2021 – 29 Aug 2021 : I think I saw Nunki

1. 2021-08-18 07:39 David C
2. 2021-08-19 11:14 Jeremy C
3. 2021-08-19 16:17 Frank Reed
4. 2021-08-29 22:31 Jeremy C

19 Aug 2021 – 30 Aug 2021 : Longitude by star clock

1. 2021-08-19 00:31 Duane Smith
2. 2021-08-19 17:14 Frank Reed
3. 2021-08-28 19:52 Duane Smith
4. 2021-08-30 08:04 Tony Oz
5. 2021-08-30 15:54 Frank Reed

01 Sep 2021 – 01 Sep 2021 : Re: Davis MK15 light mod possible?

1. 2021-09-01 04:58 Paul Dolkas

31 Aug 2021 – 01 Sep 2021 : Online celestial navigation classes scheduled for Fall

1. 2021-08-31 23:08 Frank Reed
2. 2021-09-01 16:00 John Clements

02 Sep 2021 – 03 Sep 2021 : Eldridge tide tables sun ephemeris

1. 2021-09-02 18:28 Frederick Curtis
2. 2021-09-02 18:50 Frank Reed
3. 2021-09-02 19:23 Antoine Couëtte
4. 2021-09-03 07:03 Herman Dekker

31 Aug 2021 – 03 Sep 2021 : Re: Air Force One sextant?

1. 2021-08-31 20:29 Sean C
2. 2021-09-03 01:45 Don Seltzer
3. 2021-09-03 06:49 Sean C
4. 2021-09-03 18:24 Don Seltzer
5. 2021-09-03 21:31 Sean C
6. 2021-09-03 22:17 Frank Reed

04 Sep 2021 – 04 Sep 2021 : Re: Air Force One sextant? [Spoiler!]

1. 2021-09-04 00:25 Sean C
2. 2021-09-04 01:53 Don Seltzer
3. 2021-09-04 13:49 Frank Reed

11 Aug 2021 – 04 Sep 2021 : Dummy Batteries for an A12

1. 2021-08-11 19:09 David Pike
2. 2021-08-14 23:21 Noell Wilson
3. 2021-08-15 15:41 David Pike
4. 2021-08-17 20:17 Dustin Baenen
5. 2021-08-20 15:37 Stuart T
6. 2021-08-22 16:52 Noell Wilson
7. 2021-09-04 15:56 Noell Wilson

06 Sep 2021 – 06 Sep 2021 : Cellphone tower position as GPS backup.

1. 2021-09-06 19:10 Tom Sult

06 Sep 2021 – 06 Sep 2021 : The Myth of Maury

1. 2021-09-06 15:10 Frank Reed
2. 2021-09-06 20:45 Gary LaPook

06 Sep 2021 – 07 Sep 2021 : Anomalous atmospheric conditions and Dip correction?

1. 2021-09-06 11:42 Tony Oz
2. 2021-09-07 02:24 Frank Reed

04 Sep 2021 – 07 Sep 2021 : $5 celestial navigation books at your library

1. 2021-09-04 12:33 Stuart T
2. 2021-09-04 19:04 Gary LaPook
3. 2021-09-04 22:57 Frederick Curtis
4. 2021-09-04 23:00 David C
5. 2021-09-05 00:53 Doug Faunt
6. 2021-09-05 02:30 David C
7. 2021-09-05 03:24 Sean C
8. 2021-09-05 05:36 Gary LaPook
9. 2021-09-05 15:19 Doug Faunt
10. 2021-09-06 12:33 Stuart T
11. 2021-09-06 15:13 John Clements
12. 2021-09-06 15:48 Frank Reed
13. 2021-09-07 07:05 David C
14. 2021-09-07 23:25 Murray Buckman

06 Sep 2021 – 08 Sep 2021 : ADMIN: internet connection speeds and status

1. 2021-09-06 16:05 Frank Reed
2. 2021-09-06 16:48 Charles McElhill
3. 2021-09-06 17:23 John Carbone
4. 2021-09-06 17:30 Jürgen Hoefeld
5. 2021-09-06 18:08 David Fleming
6. 2021-09-06 18:10 James F Campbell
7. 2021-09-06 18:55 Sean C
8. 2021-09-06 19:04 Richard Toohey
9. 2021-09-06 20:01 David C
10. 2021-09-06 20:03 Doug MacPherson
11. 2021-09-06 20:11 Hewitt Schlereth
12. 2021-09-06 20:18 David C
13. 2021-09-06 20:44 Murray Peake
14. 2021-09-06 20:59 Gary LaPook
15. 2021-09-06 22:16 Bill Ritchie
16. 2021-09-07 05:08 Jeremy C
17. 2021-09-07 13:01 Paul Saffo
18. 2021-09-07 13:55 Robert Neff
19. 2021-09-07 14:31 Bob Peterson
20. 2021-09-07 14:37 Chris Post
21. 2021-09-07 15:53 Doug Faunt
22. 2021-09-07 16:11 Huub Robroek
23. 2021-09-08 12:46 Jim Hickey
24. 2021-09-08 20:52 Peter Smith
25. 2021-09-08 21:54 Rafael C. Caruso

09 Sep 2021 – 09 Sep 2021 : A sextant for Artemis

1. 2021-09-09 07:27 chirila vasile

08 Sep 2021 – 09 Sep 2021 : J S Letcher and Lunars

1. 2021-09-08 23:09 David C
2. 2021-09-09 02:37 Robert VanderPol II
3. 2021-09-09 14:29 Ed Popko
4. 2021-09-09 14:32 Frank Reed
5. 2021-09-09 15:15 Ed Popko

09 Sep 2021 – 12 Sep 2021 : Link A-12 Sextant For Sale

1. 2021-09-09 05:20 Robert Swartz
2. 2021-09-09 15:17 Ed Popko
3. 2021-09-09 18:42 David Pike
4. 2021-09-09 19:16 David Pike
5. 2021-09-09 19:27 Ed Popko
6. 2021-09-12 01:09 Robert Swartz

13 Sep 2021 – 13 Sep 2021 : Frank’s On Line Celestial Navigation Courses … heartily endorsed!

1. 2021-09-13 14:07 John Carbone

10 Sep 2021 – 13 Sep 2021 : Three Oddball Sextants

1. 2021-09-10 11:20 Jan D
2. 2021-09-10 12:16 Tony Oz
3. 2021-09-10 16:13 Jan D
4. 2021-09-10 16:30 Frank Reed
5. 2021-09-11 15:52 Geoffrey Kolbe
6. 2021-09-11 22:18 Dave Walden
7. 2021-09-12 08:36 David Pike
8. 2021-09-12 11:57 Jan D
9. 2021-09-12 13:23 Alexandre Eremenko
10. 2021-09-13 10:12 Glen Swanson
11. 2021-09-13 16:00 Jan D
12. 2021-09-13 18:36 David Pike
13. 2021-09-13 18:58 Wolfgang Hasper

14 Sep 2021 – 14 Sep 2021 : Re: StarFinder Epoch

1. 2021-09-14 18:54 John Pinto

15 Sep 2021 – 15 Sep 2021 : Kollsman bubble sextant bubble repair

1. 2021-09-15 12:43 Art Leung
2. 2021-09-15 16:23 Gary LaPook

15 Sep 2021 – 15 Sep 2021 : What every Navlister needs in their study!

1. 2021-09-15 17:38 Paul Saffo

09 Sep 2021 – 15 Sep 2021 : Sextant square drive screw tool

1. 2021-09-09 14:50 Noell Wilson
2. 2021-09-09 15:49 Tony Oz
3. 2021-09-09 15:53 John Clements
4. 2021-09-15 19:55 Noell Wilson

16 Sep 2021 – 16 Sep 2021 : Re: Kollsman Periscopic Bubble Adjust

1. 2021-09-16 12:47 Art Leung

16 Sep 2021 – 16 Sep 2021 : Terminology: somethingMadeGood vs somethingOverGround?

1. 2021-09-16 07:53 Tony Oz
2. 2021-09-16 21:02 Murray Buckman

18 Sep 2021 – 18 Sep 2021 : Re: Frank’s On Line Celestial Navi gation Courses … heartily endorsed!

1. 2021-09-18 18:06 Stuart T

19 Sep 2021 – 20 Sep 2021 : You need these for your study!

1. 2021-09-19 00:35 Paul Saffo
2. 2021-09-19 01:36 Simon Horwith
3. 2021-09-19 01:50 Ed Hlywa
4. 2021-09-20 06:54 David Pike

22 Sep 2021 – 22 Sep 2021 : It's that time again

1. 2021-09-22 07:20 David Pike

14 Sep 2021 – 23 Sep 2021 : A12 bubble chamber

1. 2021-09-14 18:23 Chris Bennett
2. 2021-09-14 19:32 David Pike
3. 2021-09-15 09:43 Geoffrey Kolbe
4. 2021-09-17 04:34 Paul Dolkas
5. 2021-09-17 16:09 Tony Oz
6. 2021-09-23 15:57 Noell Wilson

27 Sep 2021 – 27 Sep 2021 : Re: Mrs Chippy and a tale of two graves

1. 2021-09-27 02:03 David C

21 Sep 2021 – 27 Sep 2021 : HiTech scratchpad instead of paper&pencil?

1. 2021-09-21 09:06 Tony Oz
2. 2021-09-21 15:40 Murray Buckman
3. 2021-09-22 14:47 Frank Reed
4. 2021-09-27 07:44 Jeremy C

24 Sep 2021 – 27 Sep 2021 : IE determination Freiberger Yacht Sextant.

1. 2021-09-24 14:36 Herman Dekker
2. 2021-09-24 17:48 Tony Oz
3. 2021-09-26 16:54 Peter Monta
4. 2021-09-26 20:12 Modris Fersters
5. 2021-09-27 06:50 Herman Dekker
6. 2021-09-27 07:40 Jeremy C
7. 2021-09-27 13:40 Herman Dekker
8. 2021-09-27 15:33 Tony Oz

28 Sep 2021 – 28 Sep 2021 : Online workshops: NavList discount and repeat rate

1. 2021-09-28 17:23 Frank Reed

26 Sep 2021 – 28 Sep 2021 : IE determination Freiberger Yacht Sextant

1. 2021-09-26 06:53 Herman Dekker
2. 2021-09-26 15:05 Tony Oz
3. 2021-09-26 17:45 Herman Dekker
4. 2021-09-26 19:59 Tony Oz
5. 2021-09-26 20:13 Herman Dekker
6. 2021-09-27 09:01 Tony Oz
7. 2021-09-28 19:41 Frank Reed

27 Sep 2021 – 28 Sep 2021 : Side error is not a real error

1. 2021-09-27 17:12 Frank Reed
2. 2021-09-27 17:55 Tony Oz
3. 2021-09-28 09:58 Antoine Couëtte
4. 2021-09-28 15:08 Frank Reed
5. 2021-09-28 16:27 Herman Dekker
6. 2021-09-28 17:23 Tony Oz
7. 2021-09-28 18:48 Antoine Couëtte
8. 2021-09-28 20:53 Herman Dekker

18 Sep 2021 – 29 Sep 2021 : What is a chronometer?

1. 2021-09-18 14:19 Frank Reed
2. 2021-09-18 15:51 Charles McElhill
3. 2021-09-19 10:51 Geoffrey Kolbe
4. 2021-09-19 19:06 Michael Cain
5. 2021-09-20 12:12 Jeremy C
6. 2021-09-29 13:51 Jim Hickey

30 Sep 2021 – 30 Sep 2021 : Celnav in the Yellow Sea

1. 2021-09-30 09:26 Jeremy C

25 Sep 2021 – 30 Sep 2021 : Status of USNO's Celestial Navigation Data web site

1. 2021-09-25 14:38 Ed Popko
2. 2021-09-25 22:27 Sean C
3. 2021-09-30 17:15 Noell Wilson

03 Oct 2021 – 04 Oct 2021 : MS Flight Simulator and a nova in Corona Borealis

1. 2021-10-03 04:07 Frank Reed
2. 2021-10-04 17:06 Frank Reed
3. 2021-10-04 20:06 Eric van der Veen

03 Oct 2021 – 05 Oct 2021 : I couldn’t help myself

1. 2021-10-03 17:36 Glen Swanson
2. 2021-10-04 17:59 Francis Upchurch
3. 2021-10-04 20:46 Alan S
4. 2021-10-04 20:51 Alan S
5. 2021-10-05 03:12 Francis Upchurch

05 Oct 2021 – 05 Oct 2021 : Anyone have a 1980's Tamaya Instruction Manual?

1. 2021-10-05 17:29 Al Stewart
2. 2021-10-05 21:47 Greg Rudzinski

28 Aug 2021 – 06 Oct 2021 : Compare Methods: Lat/Lon Near Noon

1. 2021-08-28 14:27 Frank Reed
2. 2021-08-28 18:15 Peter Hakel
3. 2021-08-31 07:48 Tony Oz
4. 2021-08-31 08:49 Tony Oz
5. 2021-08-31 20:12 Frederick Curtis
6. 2021-08-31 23:14 Frank Reed
7. 2021-08-31 23:19 Frank Reed
8. 2021-09-01 07:45 Tony Oz
9. 2021-09-01 16:39 Antoine Couëtte
10. 2021-09-02 00:45 Frederick Curtis
11. 2021-09-02 21:13 Bill Ritchie
12. 2021-09-03 08:33 Tony Oz
13. 2021-09-06 07:47 Antoine Couëtte
14. 2021-09-06 08:47 Tony Oz
15. 2021-09-07 01:56 Frank Reed
16. 2021-09-08 11:11 Luc Desmedt
17. 2021-09-08 18:54 Luc Desmedt
18. 2021-09-08 18:54 Hewitt Schlereth
19. 2021-09-11 20:16 Antoine Couëtte
20. 2021-09-12 18:35 Hewitt Schlereth
21. 2021-09-12 19:15 Antoine Couëtte
22. 2021-09-13 10:55 Frank Reed
23. 2021-09-13 14:57 Tony Oz
24. 2021-09-13 19:57 Antoine Couëtte
25. 2021-09-13 20:08 Hewitt Schlereth
26. 2021-09-13 23:23 Hewitt Schlereth
27. 2021-09-14 19:04 Antoine Couëtte
28. 2021-09-14 19:55 Antoine Couëtte
29. 2021-09-15 20:40 Herman Dekker
30. 2021-10-01 15:36 Ed Popko
31. 2021-10-01 19:16 Tony Oz
32. 2021-10-01 19:52 Antoine Couëtte
33. 2021-10-01 22:01 Ed Popko
34. 2021-10-01 22:13 Ed Popko
35. 2021-10-02 05:26 Antoine Couëtte
36. 2021-10-02 11:47 Antoine Couëtte
37. 2021-10-02 14:31 Ed Popko
38. 2021-10-02 15:51 Peter Hakel
39. 2021-10-03 18:07 Antoine Couëtte
40. 2021-10-06 00:02 Peter Hakel
41. 2021-10-06 02:31 Antoine Couëtte
42. 2021-10-06 02:52 Dave Walden

05 Oct 2021 – 06 Oct 2021 : Sextant, how to ID and tell age

1. 2021-10-05 18:55 Danny Fafard
2. 2021-10-06 03:16 Bill Morris

06 Oct 2021 – 06 Oct 2021 : Navigate by the stars - from a submerged submarine...

1. 2021-10-06 05:46 Geoffrey Kolbe

06 Oct 2021 – 06 Oct 2021 : IE in bubble sextants: not so easy

1. 2021-10-06 12:03 Tony Oz

19 Sep 2021 – 06 Oct 2021 : Re: Time balls

1. 2021-09-19 11:55 Robin Stuart
2. 2021-09-30 08:07 Jeremy C
3. 2021-10-03 21:01 David C
4. 2021-10-04 07:26 David Pike
5. 2021-10-05 09:10 Jeremy C
6. 2021-10-05 16:36 Tony Oz
7. 2021-10-05 20:33 Robin Stuart
8. 2021-10-05 22:26 Murray Buckman
9. 2021-10-06 10:05 Jeremy C
10. 2021-10-06 14:07 Robin Stuart

07 Oct 2021 – 07 Oct 2021 : Re: Finding IC for A-12 bubble sextants+ AntiSpoof

1. 2021-10-07 17:01 Herman Dekker
2. 2021-10-07 19:59 Tony Oz

08 Oct 2021 – 08 Oct 2021 : Re: Online celestial navigation classes scheduled for Fall

1. 2021-10-08 00:21 Frank Reed

08 Oct 2021 – 08 Oct 2021 : Re: Calculator v. Slide Rule for Ex-Meridian Correction

1. 2021-10-08 03:49 Alan S

08 Oct 2021 – 12 Oct 2021 : An instant value vs an integrated one?

1. 2021-10-08 07:06 Tony Oz
2. 2021-10-08 21:16 Dave Walden
3. 2021-10-09 22:07 Bill Ritchie
4. 2021-10-09 23:05 Bob Goethe
5. 2021-10-10 05:21 Peter Monta
6. 2021-10-10 05:33 Peter Monta
7. 2021-10-10 08:27 Tony Oz
8. 2021-10-10 16:47 Frank Reed
9. 2021-10-11 20:29 Tony Oz
10. 2021-10-12 21:29 Bill Ritchie

12 Oct 2021 – 13 Oct 2021 : Book available: Schereth's Lat Lon by the Noon Sight

1. 2021-10-12 00:08 Doug Faunt
2. 2021-10-12 02:24 Alan S
3. 2021-10-12 07:28 Tony Oz
4. 2021-10-13 02:33 Doug Faunt

05 Oct 2021 – 13 Oct 2021 : Finding IC for A-12 bubble sextants

1. 2021-10-05 13:43 Ed Popko
2. 2021-10-05 21:17 David Pike
3. 2021-10-05 21:29 Bill Morris
4. 2021-10-05 22:27 Ed Popko
5. 2021-10-05 22:29 Ed Popko
6. 2021-10-06 04:30 Gary LaPook
7. 2021-10-06 10:41 Ed Popko
8. 2021-10-06 13:43 Art Leung
9. 2021-10-06 14:01 Frank Reed
10. 2021-10-06 15:05 David Pike
11. 2021-10-06 15:28 Tony Oz
12. 2021-10-06 15:59 Ed Popko
13. 2021-10-06 16:30 Gary LaPook
14. 2021-10-06 16:45 David Pike
15. 2021-10-06 19:53 Doug Faunt
16. 2021-10-07 02:32 Sean C
17. 2021-10-07 05:17 Geoffrey Kolbe
18. 2021-10-07 07:07 Tony Oz
19. 2021-10-07 13:26 Art Leung
20. 2021-10-07 15:32 Tony Oz
21. 2021-10-07 23:39 David Pike
22. 2021-10-08 08:12 Gary LaPook
23. 2021-10-08 08:23 Gary LaPook
24. 2021-10-08 19:28 Art Leung
25. 2021-10-08 21:48 David Pike
26. 2021-10-08 22:45 Sean C
27. 2021-10-09 01:37 Brian Walton
28. 2021-10-09 06:22 Sean C
29. 2021-10-09 07:56 Geoffrey Kolbe
30. 2021-10-09 09:51 Herman Dekker
31. 2021-10-09 10:01 Frank Reed
32. 2021-10-09 17:31 Ed Popko
33. 2021-10-09 20:53 Matus Tejiscak
34. 2021-10-10 08:10 Geoffrey Kolbe
35. 2021-10-10 16:54 Ed Popko
36. 2021-10-11 12:25 Art Leung
37. 2021-10-11 12:33 Art Leung
38. 2021-10-11 12:34 Art Leung
39. 2021-10-11 14:40 Ed Popko
40. 2021-10-12 19:26 David Pike
41. 2021-10-13 06:08 Geoffrey Kolbe
42. 2021-10-13 13:39 Ed Popko

11 Oct 2021 – 13 Oct 2021 : Contrail and Aircraft distance

1. 2021-10-11 00:57 Antoine Couëtte
2. 2021-10-11 10:48 Antoine Couëtte
3. 2021-10-12 00:43 Frank Reed
4. 2021-10-12 17:29 Lars Bergman
5. 2021-10-12 19:38 David Pike
6. 2021-10-13 14:40 Antoine Couëtte

15 Oct 2021 – 16 Oct 2021 : Francis Chichester's Logs

1. 2021-10-15 16:48 Bill Lionheart
2. 2021-10-16 00:50 Frank Reed
3. 2021-10-16 02:15 David C
4. 2021-10-16 02:30 David C
5. 2021-10-16 09:26 Bill Lionheart
6. 2021-10-16 09:27 Bill Lionheart

16 Oct 2021 – 18 Oct 2021 : Freiberger Yacht Sextant Case Mod.

1. 2021-10-16 16:48 Herman Dekker
2. 2021-10-17 03:47 Frederick Curtis
3. 2021-10-17 12:47 Greg Rudzinski
4. 2021-10-17 17:08 Murray Buckman
5. 2021-10-18 11:10 Herman Dekker
6. 2021-10-18 22:04 Bill Morris

13 Oct 2021 – 19 Oct 2021 : Aircraft position when you first hear it

1. 2021-10-13 12:38 Antoine Couëtte
2. 2021-10-13 12:55 Frank Reed
3. 2021-10-13 14:27 David Iwancio
4. 2021-10-13 15:10 Antoine Couëtte
5. 2021-10-19 08:16 Antoine Couëtte

23 Oct 2021 – 24 Oct 2021 : Sky and Telescope in freefall

1. 2021-10-23 23:42 Frank Reed
2. 2021-10-24 00:05 John Clements

24 Oct 2021 – 24 Oct 2021 : Pacific Northwest dumped on - again

1. 2021-10-24 10:38 Noell Wilson

23 Oct 2021 – 26 Oct 2021 : A day's work in 1937 onboard the barque Alastor

1. 2021-10-23 14:31 Lars Bergman
2. 2021-10-23 22:25 Ed Popko
3. 2021-10-25 12:51 Brian Walton
4. 2021-10-26 07:07 Antoine Couëtte

26 Oct 2021 – 26 Oct 2021 : Hezzanith Sextant

1. 2021-10-26 15:40 Jan Christian Severin
2. 2021-10-26 15:57 Al Stewart
3. 2021-10-26 16:09 Al Stewart

20 Oct 2021 – 28 Oct 2021 : Sextant in an award-winning French film

1. 2021-10-20 15:52 Frank Reed
2. 2021-10-28 00:54 Noell Wilson

25 Oct 2021 – 28 Oct 2021 : The Three-body Problem

1. 2021-10-25 01:56 Bob Goethe
2. 2021-10-25 04:59 John Clements
3. 2021-10-25 11:32 Art Leung
4. 2021-10-25 12:33 Martin Whittle
5. 2021-10-25 13:39 Fred Hebard
6. 2021-10-25 15:46 Alexandre Eremenko
7. 2021-10-25 16:59 Bob Goethe
8. 2021-10-25 21:16 Gary LaPook
9. 2021-10-25 22:46 Peter Monta
10. 2021-10-26 01:41 John Clements
11. 2021-10-26 02:30 Alexandre Eremenko
12. 2021-10-27 04:05 Robert VanderPol II
13. 2021-10-27 10:50 Murray Peake
14. 2021-10-27 11:02 Fred Hebard
15. 2021-10-27 11:37 Dave Walden
16. 2021-10-27 12:52 Alexandre Eremenko
17. 2021-10-27 13:28 Robert VanderPol II
18. 2021-10-27 15:08 John Clements
19. 2021-10-27 22:02 David C
20. 2021-10-27 22:11 David C
21. 2021-10-28 15:57 Peter Monta
22. 2021-10-28 16:53 Frank Reed

29 Oct 2021 – 30 Oct 2021 : John Wesley Powell River History Museum

1. 2021-10-29 14:04 Robin Stuart
2. 2021-10-30 01:08 Ken Muldrew
3. 2021-10-30 16:33 Robin Stuart

31 Oct 2021 – 31 Oct 2021 : Thacher's Calculating Instrument

1. 2021-10-31 13:20 Robin Stuart

31 Oct 2021 – 01 Nov 2021 : Star Constellation Jigsaw Puzzle

1. 2021-10-31 21:02 David Pike
2. 2021-10-31 23:40 Ed Popko
3. 2021-11-01 10:52 Tony Oz

30 Oct 2021 – 01 Nov 2021 : Astron 1.15 integration in my nav log.

1. 2021-10-30 15:10 Mats Hjorter
2. 2021-10-31 17:27 Bill Ritchie
3. 2021-11-01 22:25 Mats Hjorter

02 Nov 2021 – 04 Nov 2021 : Tomorrow is Sun fast day

1. 2021-11-02 18:35 Frank Reed
2. 2021-11-02 19:39 Herman Dekker
3. 2021-11-03 10:05 Frank Reed
4. 2021-11-04 00:47 Frank Reed
5. 2021-11-04 06:00 John Clements
6. 2021-11-04 16:29 Frank Reed

05 Nov 2021 – 05 Nov 2021 : Re: Calibrating New 24MP DSLR Canon Rebel for CN

1. 2021-11-05 04:12 Alan S

05 Nov 2021 – 05 Nov 2021 : Re: Average Sun SD

1. 2021-11-05 14:29 Robin Stuart
2. 2021-11-05 16:35 Antoine Couëtte

03 Nov 2021 – 05 Nov 2021 : How to put a mirror spring in place ?

1. 2021-11-03 10:32 Philippe Posth
2. 2021-11-03 14:36 Tony Oz
3. 2021-11-03 15:59 Bob Goethe
4. 2021-11-03 22:32 Bill Morris
5. 2021-11-05 17:58 Philippe Posth

02 Nov 2021 – 05 Nov 2021 : Working Aircraft Bubble Sextants For Sale

1. 2021-11-02 06:18 Robert Swartz
2. 2021-11-02 19:36 Greg Herdt
3. 2021-11-05 18:14 Eric van der Veen

04 Nov 2021 – 05 Nov 2021 : The Bajo "Sea Nomads" and the stars

1. 2021-11-04 01:39 Frank Reed
2. 2021-11-05 03:58 Hewitt Schlereth
3. 2021-11-05 21:23 Ed Popko

07 Nov 2021 – 07 Nov 2021 : Re: The Nautical Sextant book, was: Sextant frame design- Who won?

1. 2021-11-07 23:43 Bill Morris

17 Oct 2021 – 08 Nov 2021 : Venus in daylight in southern latitudes

1. 2021-10-17 17:46 Frank Reed
2. 2021-10-17 21:19 David C
3. 2021-10-18 04:26 Paul Jackson
4. 2021-10-18 20:33 Jeremy C
5. 2021-10-18 21:13 David C
6. 2021-10-20 22:34 David C
7. 2021-10-21 00:28 Sean C
8. 2021-10-21 00:51 Frank Reed
9. 2021-10-21 08:03 Tony Oz
10. 2021-10-21 08:04 David C
11. 2021-10-21 08:45 David C
12. 2021-10-21 17:08 Tony Oz
13. 2021-10-21 18:15 Sean C
14. 2021-10-22 03:21 Frank Reed
15. 2021-11-08 06:23 David C

05 Nov 2021 – 08 Nov 2021 : Sextant frame design- Who won?

1. 2021-11-05 10:26 Thomas Rick
2. 2021-11-05 14:04 Thomas Rick
3. 2021-11-05 19:17 Rafael C. Caruso
4. 2021-11-06 06:55 Bill Morris
5. 2021-11-06 18:36 Bruce Cutting
6. 2021-11-07 21:45 Thomas Rick
7. 2021-11-08 12:56 Thomas Rick

08 Nov 2021 – 08 Nov 2021 : Re: Analemma.com updated!

1. 2021-11-08 16:16 Tony Oz

08 Nov 2021 – 08 Nov 2021 : Sextant Issues for Atlanta's water supply

1. 2021-11-08 17:57 Bob Goethe

08 Nov 2021 – 08 Nov 2021 : Re: The Nautical Sextant book

1. 2021-11-08 09:03 Murray Peake
2. 2021-11-08 19:13 Bruce Cutting

01 Nov 2021 – 09 Nov 2021 : Re: Calculate new coordinates given bearing and distance?

1. 2021-11-01 17:28 Tony Oz
2. 2021-11-01 18:13 Antoine Couëtte
3. 2021-11-01 22:16 Lars Bergman
4. 2021-11-02 09:07 Tony Oz
5. 2021-11-02 10:14 David Pike
6. 2021-11-02 20:35 Lars Bergman
7. 2021-11-02 21:01 Lars Bergman
8. 2021-11-03 11:53 Tony Oz
9. 2021-11-03 14:49 David Pike
10. 2021-11-04 18:06 Tony Oz
11. 2021-11-04 21:43 Lars Bergman
12. 2021-11-04 23:45 Tony Oz
13. 2021-11-05 12:24 Ed Popko
14. 2021-11-05 20:29 Don Seltzer
15. 2021-11-05 21:27 Tony Oz
16. 2021-11-06 12:42 Ed Popko
17. 2021-11-06 16:19 Lars Bergman
18. 2021-11-06 16:44 Adrian F
19. 2021-11-06 18:29 Don Seltzer
20. 2021-11-09 20:21 Ed Popko

09 Nov 2021 – 09 Nov 2021 : Re: AM and PM time sights

1. 2021-11-09 21:06 Herman Dekker

11 Nov 2021 – 11 Nov 2021 : You could publish the USNO Nautical Almanac

1. 2021-11-11 00:50 Dave Walden

06 Nov 2021 – 11 Nov 2021 : Re: Moonrise-over-Connecticut

1. 2021-11-06 21:28 Paul Hirose
2. 2021-11-08 07:11 Paul Hirose
3. 2021-11-08 22:24 Sean C
4. 2021-11-11 01:38 Peter Blaskett

11 Nov 2021 – 11 Nov 2021 : RE. Spare A8-A Bubble Chamber

1. 2021-11-11 03:27 Robert Swartz

10 Nov 2021 – 11 Nov 2021 : Any experience with a C&P "Special" sextant?

1. 2021-11-10 13:00 Thomas Rick
2. 2021-11-10 17:16 Thomas Rick
3. 2021-11-10 18:51 Frank Reed
4. 2021-11-10 20:10 Luc Van den Borre
5. 2021-11-11 10:55 Thomas Rick

07 Nov 2021 – 12 Nov 2021 : DR with traverse tables

1. 2021-11-07 16:56 Lars Bergman
2. 2021-11-08 13:41 Lars Bergman
3. 2021-11-09 09:59 David Pike
4. 2021-11-11 08:28 Tony Oz
5. 2021-11-11 20:00 Murray Peake
6. 2021-11-11 20:14 Lars Bergman
7. 2021-11-12 09:05 Tony Oz
8. 2021-11-12 10:02 John Niven

10 Nov 2021 – 12 Nov 2021 : AM and PM time sights

1. 2021-11-10 10:18 Herman Dekker
2. 2021-11-10 12:04 Lars Bergman
3. 2021-11-12 13:36 Herman Dekker

12 Nov 2021 – 12 Nov 2021 : Haversine ZD formula to Cosine ZD formula in easy stages

1. 2021-11-12 20:41 David Pike

12 Nov 2021 – 12 Nov 2021 : Lindbergh-Weems Second-Setting Pilot ’s Watch - Updated Paper

1. 2021-11-12 22:11 Ed Popko

12 Nov 2021 – 12 Nov 2021 : Re: Reeds versine formulas

1. 2021-11-12 18:51 David McN
2. 2021-11-12 19:18 Frank Reed
3. 2021-11-12 22:14 David McN

14 Nov 2021 – 14 Nov 2021 : Re: Lindbergh-Weems Second-Setting P ilot ’s Watch - Updated Paper

1. 2021-11-14 04:33 Paul Saffo

14 Nov 2021 – 14 Nov 2021 : An astronaut and former student

1. 2021-11-14 17:43 Frank Reed

20 Oct 2021 – 15 Nov 2021 : Moonrise over Connecticut, 19 October 2021

1. 2021-10-20 15:12 Frank Reed
2. 2021-10-21 01:08 Frank Reed
3. 2021-10-21 18:01 Bill Ritchie
4. 2021-10-23 15:35 Antoine Couëtte
5. 2021-10-23 18:04 Antoine Couëtte
6. 2021-10-24 10:20 Herman Dekker
7. 2021-10-24 15:04 Antoine Couëtte
8. 2021-10-25 02:56 Antoine Couëtte
9. 2021-10-27 19:02 Antoine Couëtte
10. 2021-10-28 15:09 Frank Reed
11. 2021-10-28 15:31 Frank Reed
12. 2021-10-29 19:11 Antoine Couëtte
13. 2021-10-30 03:38 Sean C
14. 2021-10-30 04:41 Antoine Couëtte
15. 2021-10-31 20:13 David Pike
16. 2021-11-15 12:32 Frank Reed

15 Nov 2021 – 15 Nov 2021 : Lunar Distance Tables and Charts - Dec 2021

1. 2021-11-15 17:31 Andrew Bauer

15 Nov 2021 – 15 Nov 2021 : "Difficult" Celestial Navigation Multiple Stars

1. 2021-11-15 18:16 Antoine Couëtte

01 Nov 2021 – 15 Nov 2021 : Re:Moonrise-over-Connecticut

1. 2021-11-01 21:47 Peter Blaskett
2. 2021-11-01 22:26 Frank Reed
3. 2021-11-02 01:05 Antoine Couëtte
4. 2021-11-02 19:44 Peter Blaskett
5. 2021-11-02 20:00 Peter Blaskett
6. 2021-11-03 11:10 Frank Reed
7. 2021-11-03 11:27 Antoine Couëtte
8. 2021-11-03 16:29 Dave Walden
9. 2021-11-03 23:12 Bill Ritchie
10. 2021-11-04 04:59 Peter Blaskett
11. 2021-11-05 08:15 Antoine Couëtte
12. 2021-11-05 13:06 Antoine Couëtte
13. 2021-11-05 15:19 Antoine Couëtte
14. 2021-11-05 18:49 Dave Walden
15. 2021-11-05 20:30 Peter Blaskett
16. 2021-11-05 22:42 Bill Ritchie
17. 2021-11-05 23:13 Antoine Couëtte
18. 2021-11-07 11:14 Antoine Couëtte
19. 2021-11-15 12:02 Frank Reed
20. 2021-11-15 22:45 Sean C

12 Nov 2021 – 16 Nov 2021 : Practical Haversine Use

1. 2021-11-12 21:06 David Pike
2. 2021-11-13 08:58 Tibor Miseta
3. 2021-11-13 20:59 David Pike
4. 2021-11-14 18:11 Frank Reed
5. 2021-11-14 19:50 Tony Oz
6. 2021-11-14 21:16 Fred Hebard
7. 2021-11-15 20:07 Andy Howse
8. 2021-11-16 17:15 Tony Oz
9. 2021-11-16 18:30 Lars Bergman

16 Nov 2021 – 18 Nov 2021 : Re: Practical Haversine Use (with logs)

1. 2021-11-16 20:39 Tony Oz
2. 2021-11-17 20:52 Robin Stuart
3. 2021-11-17 21:38 Lars Bergman
4. 2021-11-18 07:46 Tony Oz

29 Oct 2021 – 18 Nov 2021 : HO 214 History

1. 2021-10-29 17:44 John Pinto
2. 2021-10-30 02:09 David C
3. 2021-10-30 02:27 David C
4. 2021-10-30 03:11 David C
5. 2021-10-30 04:01 Peter Monta
6. 2021-10-30 04:35 Gary LaPook
7. 2021-10-30 11:39 John Pinto
8. 2021-10-30 20:18 Doug Faunt
9. 2021-10-30 22:25 David C
10. 2021-10-30 22:45 David C
11. 2021-10-31 10:50 Wolfgang Köberer
12. 2021-11-02 14:45 John Pinto
13. 2021-11-18 22:31 Frederick Curtis

17 Nov 2021 – 19 Nov 2021 : Re: Lindbergh-Weems Second-Setting Pilot's Watch -Updated Paper

1. 2021-11-17 14:38 Art Leung
2. 2021-11-17 21:14 Ed Popko
3. 2021-11-19 15:51 Art Leung

20 Nov 2021 – 20 Nov 2021 : Moon altitude corrections and artificial horizons

1. 2021-11-20 05:20 Rod Brown
2. 2021-11-20 23:08 Tibor Miseta

17 Nov 2021 – 20 Nov 2021 : Kollsman electronic averager power

1. 2021-11-17 14:28 Art Leung
2. 2021-11-17 19:20 Gary LaPook
3. 2021-11-18 14:29 Art Leung
4. 2021-11-18 17:44 Paul Hirose
5. 2021-11-19 07:26 Gary LaPook
6. 2021-11-19 15:34 Art Leung
7. 2021-11-19 15:37 Art Leung
8. 2021-11-19 18:39 Gary LaPook
9. 2021-11-20 23:26 Art Leung

23 Nov 2021 – 23 Nov 2021 : Remembering Don Treworgy

1. 2021-11-23 14:42 Ed Popko

23 Nov 2021 – 24 Nov 2021 : EoT Curve calculated by VB

1. 2021-11-23 20:18 Bob Goethe
2. 2021-11-23 22:27 Sean C
3. 2021-11-23 23:28 Ed Popko
4. 2021-11-24 00:01 Peter Hakel
5. 2021-11-24 04:12 Bob Goethe
6. 2021-11-24 16:17 Frank Reed

12 Nov 2021 – 25 Nov 2021 : An interesting series Navigation of Books by the same author

1. 2021-11-12 16:51 David Pike
2. 2021-11-15 12:37 Frank Reed
3. 2021-11-15 23:28 David Pike
4. 2021-11-25 02:13 Frank Reed
5. 2021-11-25 16:34 David Pike
6. 2021-11-25 19:58 Nick M
7. 2021-11-25 21:08 Rafael C. Caruso

19 Nov 2021 – 27 Nov 2021 : Bare essentials

1. 2021-11-19 22:03 David McN
2. 2021-11-20 02:15 Tony Oz
3. 2021-11-20 05:31 Geoffrey Kolbe
4. 2021-11-20 20:09 David McN
5. 2021-11-21 09:36 Geoffrey Kolbe
6. 2021-11-22 14:01 Frank Reed
7. 2021-11-22 16:01 Tony Oz
8. 2021-11-22 16:11 Murray Peake
9. 2021-11-22 18:52 Frank Reed
10. 2021-11-23 09:03 Herman Dekker
11. 2021-11-23 09:54 David McN
12. 2021-11-23 15:17 Doug Faunt
13. 2021-11-23 16:17 Murray Peake
14. 2021-11-23 17:00 Tony Oz
15. 2021-11-23 20:44 Patrick Dickie
16. 2021-11-24 16:05 Doug Faunt
17. 2021-11-24 16:43 Tony Oz
18. 2021-11-24 18:10 Doug Faunt
19. 2021-11-27 15:46 Bob Goethe

27 Nov 2021 – 27 Nov 2021 : Cosmic Ray Muons Not GPS Satellites

1. 2021-11-27 14:46 Nick M
2. 2021-11-27 19:36 Frank Reed
3. 2021-11-27 20:34 Peter Monta

22 Nov 2021 – 29 Nov 2021 : Noon Longitude by Equal Altitudes

1. 2021-11-22 20:00 David Pike
2. 2021-11-23 21:00 David Pike
3. 2021-11-24 21:14 Robin Stuart
4. 2021-11-25 09:40 David Pike
5. 2021-11-25 16:13 David Pike
6. 2021-11-28 17:52 Robin Stuart
7. 2021-11-29 21:16 David Pike

30 Nov 2021 – 30 Nov 2021 : Scientific calculators - statistics mode

1. 2021-11-30 15:10 Bela Kovacs
2. 2021-11-30 23:58 Frank Reed

01 Dec 2021 – 01 Dec 2021 : Anyone know Ben Emory in Maine? CN STEM class

1. 2021-12-01 13:52 Stuart T

29 Nov 2021 – 01 Dec 2021 : The Last Navigator Video

1. 2021-11-29 15:01 Stuart T
2. 2021-11-30 07:17 Gary LaPook
3. 2021-11-30 14:27 Tony Oz
4. 2021-12-01 18:16 Gary LaPook

02 Dec 2021 – 02 Dec 2021 : Sarcasm and navigation

1. 2021-12-02 07:10 Andrés Ruiz

03 Dec 2021 – 03 Dec 2021 : Kollsman Sextant--Correction on Averagers

1. 2021-12-03 20:46 Robert Swartz

03 Dec 2021 – 04 Dec 2021 : My first posts are legally adults today

1. 2021-12-03 23:15 Frank Reed
2. 2021-12-04 00:19 Oz DiGennaro
3. 2021-12-04 04:42 Robert VanderPol II
4. 2021-12-04 07:58 Andrew Bauer

03 Dec 2021 – 05 Dec 2021 : Re: For which celestial bodies is it relevant to display the lunar distance?

1. 2021-12-03 08:34 Tony Oz
2. 2021-12-03 17:58 Andrew Bauer
3. 2021-12-03 21:34 Tony Oz
4. 2021-12-04 08:10 Andrew Bauer
5. 2021-12-04 11:05 Murray Peake
6. 2021-12-05 14:15 Tony Oz
7. 2021-12-05 15:54 Andrew Bauer

02 Dec 2021 – 05 Dec 2021 : Celnav.nl is no more? Pity!

1. 2021-12-02 10:34 Tony Oz
2. 2021-12-02 18:39 Antoine Couëtte
3. 2021-12-02 18:53 Frank Reed
4. 2021-12-02 18:53 John Clements
5. 2021-12-03 00:29 Herman Dekker
6. 2021-12-03 02:42 Frank Reed
7. 2021-12-03 07:53 Tony Oz
8. 2021-12-03 08:31 Tony Oz
9. 2021-12-03 15:39 Herman Dekker
10. 2021-12-03 22:19 Oz DiGennaro
11. 2021-12-05 10:02 Huub Robroek
12. 2021-12-05 15:57 Andrew Bauer

05 Dec 2021 – 05 Dec 2021 : Antarctic eclipse navigation

1. 2021-12-05 16:02 Frank Reed

07 Dec 2021 – 07 Dec 2021 : Where lies the hole in the Polar Cusp?

1. 2021-12-07 11:13 David Pike
2. 2021-12-07 15:15 Frank Reed

03 Dec 2021 – 07 Dec 2021 : Ex RNZAF navigator keen to learn marine sextant ways

1. 2021-12-03 06:29 Howard G
2. 2021-12-03 07:40 Bob Goethe
3. 2021-12-03 08:51 Bob Goethe
4. 2021-12-03 08:59 Tony Oz
5. 2021-12-03 14:06 Art Leung
6. 2021-12-03 18:08 David Pike
7. 2021-12-03 23:15 Howard G
8. 2021-12-04 09:40 David Pike
9. 2021-12-04 13:47 Matthew G. Ashbrook
10. 2021-12-06 21:27 Art Leung
11. 2021-12-06 21:51 Art Leung
12. 2021-12-07 14:53 Matthew G. Ashbrook
13. 2021-12-07 16:18 Art Leung

08 Dec 2021 – 08 Dec 2021 : USNO birthday

1. 2021-12-08 12:48 Dave Walden

08 Dec 2021 – 08 Dec 2021 : Verifying the Vexatious 'v' Correction

1. 2021-12-08 14:30 David Pike
2. 2021-12-08 15:33 Frank Reed

09 Dec 2021 – 10 Dec 2021 : Visiting San Francisco area

1. 2021-12-09 01:20 Frank Reed
2. 2021-12-09 18:22 Alan S
3. 2021-12-10 01:26 Doug Faunt

14 Nov 2021 – 10 Dec 2021 : Navigation Spreadsheets in 2022

1. 2021-11-14 16:16 Peter Hakel
2. 2021-11-14 17:05 Frank Reed
3. 2021-11-14 18:30 Peter Hakel
4. 2021-11-14 20:03 Robin Stuart
5. 2021-11-15 12:09 Frank Reed
6. 2021-11-15 23:24 Sean C
7. 2021-11-16 14:01 Robin Stuart
8. 2021-11-26 18:19 Peter Hakel
9. 2021-11-26 18:54 Frank Reed
10. 2021-11-26 21:51 Peter Hakel
11. 2021-11-28 11:01 Bill Ritchie
12. 2021-12-10 18:15 Frank Reed

10 Dec 2021 – 10 Dec 2021 : Mary, Mary, quite contrary how does your twilight glow?

1. 2021-12-10 18:54 David Pike

03 Dec 2021 – 10 Dec 2021 : Kollsman Aircraft Sextants

1. 2021-12-03 02:31 Robert Swartz
2. 2021-12-03 07:46 Herman Dekker
3. 2021-12-03 14:57 Werner Luehmann
4. 2021-12-03 15:24 Art Leung
5. 2021-12-03 16:05 David Pike
6. 2021-12-04 09:09 David Pike
7. 2021-12-07 14:07 Robert Swartz
8. 2021-12-07 16:37 David Pike
9. 2021-12-07 22:52 Robert Swartz
10. 2021-12-08 20:41 Art Leung
11. 2021-12-09 00:02 David Pike
12. 2021-12-09 00:44 Howard G
13. 2021-12-09 01:13 Howard G
14. 2021-12-09 09:59 David Pike
15. 2021-12-10 20:11 David Pike

27 Nov 2021 – 11 Dec 2021 : Re: An interesting series of Navigation Books by the same author

1. 2021-11-27 20:14 Frank Reed
2. 2021-12-11 00:43 Frank Reed

10 Dec 2021 – 11 Dec 2021 : Where is the Prime Meridian?

1. 2021-12-10 19:12 Murray Peake
2. 2021-12-10 19:51 Frank Reed
3. 2021-12-10 20:32 Murray Peake
4. 2021-12-10 21:40 David Pike
5. 2021-12-10 23:19 David Pike
6. 2021-12-11 06:53 David C
7. 2021-12-11 07:45 David C
8. 2021-12-11 09:22 Murray Peake
9. 2021-12-11 09:28 Tony Oz
10. 2021-12-11 12:01 Geoffrey Kolbe
11. 2021-12-11 15:36 Murray Peake
12. 2021-12-11 15:39 Murray Peake
13. 2021-12-11 17:17 David Pike
14. 2021-12-11 22:31 David Pike
15. 2021-12-11 23:08 Sean C

14 Dec 2021 – 14 Dec 2021 : Morning star

1. 2021-12-14 02:56 Murray Buckman
2. 2021-12-14 11:13 Antoine Couëtte
3. 2021-12-14 14:53 D Maracle
4. 2021-12-14 16:55 Murray Buckman

14 Dec 2021 – 14 Dec 2021 : A-12 Sextant For Sale--Reconditioned and Operational

1. 2021-12-14 17:50 Robert Swartz

12 Dec 2021 – 15 Dec 2021 : A10 sextant for sale

1. 2021-12-12 21:10 David C
2. 2021-12-13 21:09 Ed Popko
3. 2021-12-13 22:35 Bill Morris
4. 2021-12-14 00:38 Oz DiGennaro
5. 2021-12-14 03:49 David C
6. 2021-12-14 17:29 David Pike
7. 2021-12-14 17:54 Robert Swartz
8. 2021-12-15 17:27 Noell Wilson

16 Dec 2021 – 16 Dec 2021 : Google Maps "Do not use for navigation"?

1. 2021-12-16 14:18 Andrés Ruiz

30 Nov 2021 – 20 Dec 2021 : A day's work in 1937 onboard the barque Alastor, revisited

1. 2021-11-30 11:54 Lars Bergman
2. 2021-12-01 11:28 Tony Oz
3. 2021-12-05 10:34 Brian Walton
4. 2021-12-05 21:23 Lars Bergman
5. 2021-12-10 09:13 Brian Walton
6. 2021-12-10 13:05 Lars Bergman
7. 2021-12-12 12:01 Brian Walton
8. 2021-12-13 09:13 Lars Bergman
9. 2021-12-20 20:04 David Pike

21 Dec 2021 – 21 Dec 2021 : When and where is the Solstice today?

1. 2021-12-21 03:40 Frank Reed
2. 2021-12-21 05:30 Manuel Cruz
3. 2021-12-21 05:43 Glen Swanson
4. 2021-12-21 06:07 Sean C
5. 2021-12-21 12:44 Glen Swanson

20 Dec 2021 – 21 Dec 2021 : Jack London: author and navigator

1. 2021-12-20 01:45 Frank Reed
2. 2021-12-20 01:58 Greg Rudzinski
3. 2021-12-20 04:13 Howard G
4. 2021-12-20 14:11 David Pike
5. 2021-12-20 16:24 Doug Faunt
6. 2021-12-20 18:45 Frank Reed
7. 2021-12-20 19:16 David Pike
8. 2021-12-20 19:32 Frank Reed
9. 2021-12-20 22:52 Greg Rudzinski
10. 2021-12-21 21:29 David Pike

21 Dec 2021 – 22 Dec 2021 : Chilean author: future of celestial

1. 2021-12-21 19:10 Frank Reed
2. 2021-12-21 20:43 Howard G
3. 2021-12-21 20:56 David Pike
4. 2021-12-21 21:52 John Rizzuto
5. 2021-12-21 22:18 Howard G
6. 2021-12-21 22:50 Howard G
7. 2021-12-22 00:17 Paul Jackson
8. 2021-12-22 03:03 Howard G

22 Dec 2021 – 22 Dec 2021 : USNO update

1. 2021-12-22 13:12 Dave Walden

22 Dec 2021 – 22 Dec 2021 : Maneuvering Board

1. 2021-12-22 22:32 Michalis Vaidanis

20 Dec 2021 – 23 Dec 2021 : Latitude and longitude by birdfoot

1. 2021-12-20 01:30 Frank Reed
2. 2021-12-20 10:48 Tony Oz
3. 2021-12-20 12:16 David Pike
4. 2021-12-20 12:54 David Pike
5. 2021-12-20 14:52 Jim Rives
6. 2021-12-20 14:57 Robin Stuart
7. 2021-12-20 15:58 David Pike
8. 2021-12-21 01:16 Frank Reed
9. 2021-12-21 01:34 Frank Reed
10. 2021-12-21 01:58 Frank Reed
11. 2021-12-21 03:35 Frank Reed
12. 2021-12-21 03:46 Jim Rives
13. 2021-12-22 11:54 David Pike
14. 2021-12-22 19:43 Robin Stuart
15. 2021-12-22 21:01 David Pike
16. 2021-12-23 03:11 Frank Reed
17. 2021-12-23 12:51 Robin Stuart
18. 2021-12-23 16:58 David Pike
19. 2021-12-23 20:05 Frank Reed
20. 2021-12-23 20:39 Frank Reed
21. 2021-12-23 20:54 David Pike

13 Dec 2021 – 24 Dec 2021 : Re:DIY Starfinder - a lockdown project

1. 2021-12-13 20:25 Herman Dekker
2. 2021-12-14 21:52 Tibor Miseta
3. 2021-12-15 10:39 Herman Dekker
4. 2021-12-19 11:49 Robert VanderPol II
5. 2021-12-21 08:38 Herman Dekker
6. 2021-12-21 14:43 Tony Oz
7. 2021-12-23 21:37 Robert VanderPol II
8. 2021-12-24 06:18 Robert VanderPol II
9. 2021-12-24 19:44 Gary LaPook
10. 2021-12-24 19:49 Gary LaPook
11. 2021-12-24 19:54 Gary LaPook

26 Dec 2021 – 26 Dec 2021 : See sunspots in sextant scopes

1. 2021-12-26 18:35 Frank Reed

28 Dec 2021 – 30 Dec 2021 : Re: Air Navigation, Local Hour Angle Type X-1 computer

1. 2021-12-28 19:49 Alan S
2. 2021-12-30 13:43 Ed Popko

31 Dec 2021 – 31 Dec 2021 : Internation Date Line

1. 2021-12-31 17:17 Frank Reed
2. 2021-12-31 19:08 Doug Faunt

05 Dec 2021 – 01 Jan 2022 : International Date Line

1. 2021-12-05 08:20 Philippe Posth
2. 2021-12-05 14:10 Tony Oz
3. 2021-12-05 14:30 Frank Reed
4. 2021-12-05 16:40 David Pike
5. 2022-01-01 01:25 Frank Reed
6. 2022-01-01 01:40 Frank Reed
7. 2022-01-01 20:04 Jeremy C

31 Dec 2021 – 01 Jan 2022 : Air Navigation Began With Concrete Arrows, by Robert Novell

1. 2021-12-31 14:26 Ed Popko
2. 2021-12-31 15:45 Doug Faunt
3. 2022-01-01 11:06 Bill Ritchie
4. 2022-01-01 18:11 Doug Faunt
5. 2022-01-01 20:42 Sean C

23 Dec 2021 – 03 Jan 2022 : Great circle crossing the Equator on a Mercator's Chart?

1. 2021-12-23 21:54 David Pike
2. 2021-12-23 23:45 Doug Faunt
3. 2021-12-24 04:41 Peter Hakel
4. 2021-12-24 11:07 David Pike
5. 2021-12-24 23:09 Jeremy C
6. 2022-01-03 13:45 Andrés Ruiz

24 Dec 2021 – 03 Jan 2022 : Bermuda to St Helena on a North Atlantic Mercator Chart

1. 2021-12-24 11:10 David Pike
2. 2021-12-24 19:06 Frank Reed
3. 2021-12-24 21:21 Peter Hakel
4. 2021-12-24 22:27 David Pike
5. 2021-12-25 19:58 Frank Reed
6. 2021-12-27 00:22 Gary LaPook
7. 2021-12-27 00:23 Gary LaPook
8. 2021-12-27 00:41 Gary LaPook
9. 2021-12-27 06:10 Gary LaPook
10. 2021-12-27 14:19 David Pike
11. 2021-12-27 20:46 Howard G
12. 2021-12-27 23:32 David Pike
13. 2021-12-28 14:37 Tony Oz
14. 2021-12-28 17:55 Frank Reed
15. 2021-12-28 22:31 David Pike
16. 2021-12-28 23:28 David Pike
17. 2021-12-28 23:47 David Pike
18. 2021-12-29 18:23 Robin Stuart
19. 2021-12-29 18:31 Lars Bergman
20. 2021-12-29 19:53 David Pike
21. 2021-12-31 00:00 Howard G
22. 2021-12-31 15:29 Ed Popko
23. 2021-12-31 22:00 Doug Faunt
24. 2022-01-01 12:24 Andy Howse
25. 2022-01-01 18:06 Doug Faunt
26. 2022-01-01 20:07 Jeremy C
27. 2022-01-01 20:22 Jeremy C
28. 2022-01-01 20:29 Andy Howse
29. 2022-01-02 15:26 Ed Popko
30. 2022-01-02 20:25 David Pike
31. 2022-01-03 15:09 Jeremy C
32. 2022-01-03 15:20 Jeremy C

21 Dec 2021 – 03 Jan 2022 : Re: Astron Version 2.2

1. 2021-12-21 23:59 Barry Messer
2. 2022-01-03 22:03 Barry Messer

24 Dec 2021 – 26 Jan 2022 : Traditional Wayfinding

1. 2021-12-24 10:47 Brian Walton
2. 2021-12-24 13:36 Ed Popko
3. 2021-12-24 14:36 David Pike
4. 2021-12-24 15:35 David Pike
5. 2021-12-31 16:56 Brian Walton
6. 2021-12-31 21:18 David Pike
7. 2022-01-01 21:10 David Pike
8. 2022-01-04 12:49 Brian Walton
9. 2022-01-04 20:10 David Pike
10. 2022-01-07 16:34 Brian Walton
11. 2022-01-14 05:33 Paul Dolkas
12. 2022-01-14 18:13 Frank Reed
13. 2022-01-14 21:16 Murray Buckman
14. 2022-01-15 17:52 Ed Popko
15. 2022-01-15 21:10 Frank Reed
16. 2022-01-16 01:27 Murray Buckman
17. 2022-01-16 10:54 Brian Walton
18. 2022-01-16 20:05 David Pike
19. 2022-01-18 18:41 Wolfgang Köberer
20. 2022-01-19 03:18 Murray Buckman
21. 2022-01-20 10:48 Tony Oz
22. 2022-01-23 05:34 Paul Saffo
23. 2022-01-23 20:20 Tony Oz
24. 2022-01-25 20:01 Paul Saffo
25. 2022-01-26 12:16 Tony Oz
26. 2022-01-26 21:25 Paul Saffo