Index includes 536 messages. Sorted by date, recent messages last.
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| Re: Proportional Logarithms | Ed Popko | 28 Feb 2015, 20:13 |
| Replica Davis Quadrant (Backstaff) | Ed Popko | 4 Mar 2015, 12:26 |
| CP-300/U Star Finder | Ed Popko | 7 Mar 2015, 11:27 |
| Re: CP-300/U Star Finder | Ed Popko | 9 Mar 2015, 11:11 |
| Re: CP-300/U Star Finder | Ed Popko | 9 Mar 2015, 11:14 |
| Re: Twenty years of "Longitude" and twenty years of GPS | Ed Popko | 14 Mar 2015, 20:49 |
| Re: CP-300/U Star Finder | Ed Popko | 15 Mar 2015, 10:45 |
| Re: E6B/Dalton Computer | Ed Popko | 15 Mar 2015, 13:22 |
| Memory Aid for Marcq St Hilaire Method | Ed Popko | 20 Mar 2015, 09:47 |
| Historic Equinox LAN error: Ocean Navigator | Ed Popko | 20 Mar 2015, 11:44 |
| Celestial Navigation in the Movies | Ed Popko | 23 Mar 2015, 14:58 |
| Re: Celestial Navigation in the Movies | Ed Popko | 24 Mar 2015, 00:04 |
| Re: Celestial Navigation in the Movies | Ed Popko | 24 Mar 2015, 23:34 |
| Re: Celestial Navigation in the Movies | Ed Popko | 24 Mar 2015, 23:53 |
| Octants in Winslow Homer's "8 Bells" Painting | Ed Popko | 11 Apr 2015, 15:43 |
| Clockmaker John Harrison vindicated | Ed Popko | 19 Apr 2015, 00:54 |
| Cel Nav prep for Marion-Bermuda Race | Ed Popko | 19 Apr 2015, 14:58 |
| Tripod Mirror Artificial Horizon | Ed Popko | 20 Apr 2015, 23:16 |
| Re: That darned old cocked hat | Ed Popko | 28 Apr 2015, 20:30 |
| Re: Haversine- how to derive it? | Ed Popko | 17 May 2015, 11:00 |
| Re: 2102-D star finder or other? | Ed Popko | 2 Jun 2015, 19:13 |
| Re: Jack Aubrey, Navigator | Ed Popko | 3 Jun 2015, 00:00 |
| Timing error impact on Hc | Ed Popko | 6 Jun 2015, 10:36 |
| Re: Timing error impact on Hc | Ed Popko | 7 Jun 2015, 10:43 |
| Re: Timing error impact on Hc | Ed Popko | 7 Jun 2015, 15:45 |
| Re: Timing error impact on Hc | Ed Popko | 7 Jun 2015, 23:14 |
| Re: Greg's article on hav-Doniol in "Ocean Navigator" | Ed Popko | 11 Jun 2015, 09:32 |
| Plot Sheet Generator | Ed Popko | 2 Jul 2015, 18:22 |
| Re: Table De Point Miniature By R. Doniol | Ed Popko | 3 Jul 2015, 12:57 |
| Re: Plot Sheet Generator | Ed Popko | 5 Jul 2015, 11:57 |
| Re: Another "emergency navigation" sightreductionmethod | Ed Popko | 9 Jul 2015, 00:03 |
| Re: Trivial Pursuit: Name that sextant | Ed Popko | 13 Jul 2015, 23:33 |
| Re: What precision is required in cel nav? | Ed Popko | 20 Jul 2015, 23:40 |
| Image of Earth - what is GHA and Dec of the Sun? | Ed Popko | 24 Jul 2015, 19:57 |
| Re: Plotting vs calculating Position | Ed Popko | 30 Jul 2015, 15:47 |
| Re: Plotting vs calculating Position | Ed Popko | 31 Jul 2015, 01:31 |
| Re: Book - Wind, Sand and Stars | Ed Popko | 20 Aug 2015, 23:28 |
| Finding your Position via Lunar Eclipses | Ed Popko | 25 Aug 2015, 14:24 |
| Re: Finding your Position via Lunar Eclipses | Ed Popko | 26 Aug 2015, 23:43 |
| Re: Finding your Position via Lunar Eclipses | Ed Popko | 27 Aug 2015, 10:39 |
| Dung beetles navigate by stars | Ed Popko | 29 Aug 2015, 17:58 |
| Re: Dung beetles navigate by stars | Ed Popko | 29 Aug 2015, 20:28 |
| Re: Dung beetles navigate by stars | Ed Popko | 30 Aug 2015, 00:54 |
| Re: Puzzling Sun sights yesterday | Ed Popko | 31 Aug 2015, 10:07 |
| Re: Puzzling Sun sights yesterday | Ed Popko | 31 Aug 2015, 17:49 |
| Re: Noon Sun today: Connecticut, 12:46 EDT | Ed Popko | 7 Sep 2015, 18:24 |
| The years' fastest sunsets happen around the equinoxes | Ed Popko | 21 Sep 2015, 23:46 |
| Re: This weekend at Mystic Seaport: the "Old Navigation" | Ed Popko | 5 Oct 2015, 12:20 |
| Re: Volvo Ocean Race -- CN required? | Ed Popko | 1 Nov 2015, 22:46 |
| Traditional Hawaiian Voyaging-Navigation - NY Times Science | Ed Popko | 3 Nov 2015, 16:29 |
| Re: Interesting library | Ed Popko | 30 Nov 2015, 18:20 |
| Re: Venus Moon Occultation Lunar Captured by DSLR | Ed Popko | 9 Dec 2015, 20:29 |
| Re: Venus Moon Occultation Lunar Captured by DSLR | Ed Popko | 10 Dec 2015, 22:07 |
| Re: Calculator v. Slide Rule for Ex-Meridian Correction | Ed Popko | 3 Jan 2016, 15:58 |
| Re: Traditional navigation by slide rule | Ed Popko | 11 Jan 2016, 23:30 |
| A wonderful dawn with all four planets | Ed Popko | 19 Jan 2016, 11:41 |
| Re: Space sextants | Ed Popko | 27 Jan 2016, 18:43 |
| Re: Star identification puzzle | Ed Popko | 31 Jan 2016, 11:19 |
| A "three dimensional slide-rule" for celestial | Ed Popko | 2 Feb 2016, 13:59 |
| The Science of Time | Ed Popko | 13 Feb 2016, 23:42 |
| Air Navigation, Local Hour Angle Type X-1 computer | Ed Popko | 17 Feb 2016, 17:15 |
| Re: Air Navigation, Local Hour Angle Type X-1 computer | Ed Popko | 18 Feb 2016, 14:53 |
| Re: Air Navigation, Local Hour Angle Type X-1 computer | Ed Popko | 18 Feb 2016, 23:32 |
| Re: "Dalton Dead Reckoning Computor" Type E-6B | Ed Popko | 19 Feb 2016, 20:30 |
| Re: Scale a small area plotting sheet? | Ed Popko | 1 Mar 2016, 10:49 |
| Re: Scale a small area plotting sheet? | Ed Popko | 6 Mar 2016, 12:52 |
| Smithsonian "Time and Navigation" exhibit updated | Ed Popko | 28 Mar 2016, 19:13 |
| Re: Smithsonian "Time and Navigation" exhibit updated | Ed Popko | 29 Mar 2016, 09:49 |
| Re: Advice on Box Sextant | Ed Popko | 3 Apr 2016, 09:47 |
| Re: U-boat Celestial Navigation WWII | Ed Popko | 11 Apr 2016, 14:01 |
| Orienteering | Ed Popko | 21 Apr 2016, 20:24 |
| NavList graphic banner | Ed Popko | 29 Apr 2016, 09:44 |
| Re: Rolling Cruise Ship | Ed Popko | 29 May 2016, 12:23 |
| Re: Attempting to decipher a "time sight" | Ed Popko | 31 May 2016, 16:12 |
| Re: Attempting to decipher a "time sight" | Ed Popko | 31 May 2016, 21:16 |
| Re: Navigation - a state of mind? | Ed Popko | 3 Jun 2016, 17:27 |
| Hokule'a Arrives in New York City | Ed Popko | 8 Jun 2016, 22:50 |
| Re: Neat video about LEM stellar alignment scope | Ed Popko | 10 Jun 2016, 20:35 |
| Re: Neat video about LEM stellar alignment scope | Ed Popko | 11 Jun 2016, 09:18 |
| Thoughts on why 'north' is at the top of maps (BBC) | Ed Popko | 15 Jun 2016, 09:41 |
| Patrick O'Brian characters discuss time and longitude | Ed Popko | 25 Jun 2016, 09:48 |
| Mysterious celestial measurement | Ed Popko | 1 Jul 2016, 13:42 |
| Real Viking Ship Completes North Atlantic Crossing | Ed Popko | 3 Jul 2016, 10:46 |
| Lost 19th Century Whaling Fleet Found Off Alaska's Arctic Coast | Ed Popko | 19 Jul 2016, 18:26 |
| Re: And even more celestial-in-case-GPS-goes-down silliness | Ed Popko | 20 Jul 2016, 18:43 |
| Museo Naval, Madrid | Ed Popko | 2 Aug 2016, 13:19 |
| Re: Museo Naval, Madrid | Ed Popko | 2 Aug 2016, 17:54 |
| Re: 1947 Navigation lesson shipboard | Ed Popko | 6 Aug 2016, 10:14 |
| Re: 1947 Navigation lesson shipboard | Ed Popko | 7 Aug 2016, 11:40 |
| Re: GPS jamming concerns | Ed Popko | 9 Aug 2016, 15:35 |
| Re: GPS jamming concerns | Ed Popko | 12 Aug 2016, 10:53 |
| Re: More bluster for the Year of Stupid | Ed Popko | 12 Aug 2016, 12:29 |
| 1802 first edition of The New American Practical Navigator for sale | Ed Popko | 20 Aug 2016, 13:18 |
| Sextant pre-set for taking sun-moon lunars | Ed Popko | 28 Aug 2016, 00:11 |
| Re: Sextant pre-set for taking sun-moon lunars | Ed Popko | 28 Aug 2016, 19:41 |
| Re: Lunars: how to use the prop.log tables? | Ed Popko | 30 Aug 2016, 18:13 |
| Re: Lunars: how to use the prop.log tables? | Ed Popko | 30 Aug 2016, 22:05 |
| Re: Lunars: how to use the prop.log tables? | Ed Popko | 31 Aug 2016, 00:15 |
| Re: Weems and Plath Celestial slide rule instructions. | Ed Popko | 5 Sep 2016, 09:50 |
| Best ages for taking Moon-Sun lunars | Ed Popko | 11 Sep 2016, 20:58 |
| Canada Finds Second Ship from Doomed Franklin Voyage | Ed Popko | 12 Sep 2016, 23:40 |
| Re: Sextant of the future? | Ed Popko | 16 Sep 2016, 18:47 |
| Re: Modern Lunars | Ed Popko | 29 Sep 2016, 09:16 |
| Celestial navigation during the Civil War | Ed Popko | 3 Oct 2016, 15:49 |
| Re: Celestial navigation during the Civil War | Ed Popko | 3 Oct 2016, 20:54 |
| Re: Celestial navigation during the Civil War | Ed Popko | 4 Oct 2016, 21:21 |
| Another round on the fate of Amelia Earhart in today's news | Ed Popko | 1 Nov 2016, 20:38 |
| Re: Another round on the fate of Amelia Earhart in today's news | Ed Popko | 2 Nov 2016, 09:38 |
| Perigee full moon November 14th - Time for a special lunar? | Ed Popko | 3 Nov 2016, 22:15 |
| Re: Perigee full moon November 14th - Time for a special lunar? | Ed Popko | 13 Nov 2016, 23:37 |
| How Globes were Made in the 1950s | Ed Popko | 18 Nov 2016, 22:15 |
| Re: "Super-Lune du siècle" | Ed Popko | 19 Nov 2016, 19:58 |
| Re: Celestial Navigation in the Movies | Ed Popko | 3 Dec 2016, 18:42 |
| USS Arizona mystery superstructure detail | Ed Popko | 9 Dec 2016, 01:09 |
| Re: Is Sextant a generic word? | Ed Popko | 10 Dec 2016, 12:29 |
| Re: Is Sextant a generic word? | Ed Popko | 10 Dec 2016, 20:41 |
| Twitter Cel Nav Challenge | Ed Popko | 11 Dec 2016, 00:17 |
| Re: Twitter Cel Nav Challenge | Ed Popko | 11 Dec 2016, 17:31 |
| Re: The lie of the land: when map makers get it wrong | Ed Popko | 12 Dec 2016, 21:00 |
| Re: A Navlist member is getting an award | Ed Popko | 12 Dec 2016, 22:17 |
| Twitter Cel Nav Challenge - submissions | Ed Popko | 12 Dec 2016, 23:58 |
| Finding Polaris at the bottom of a bottle | Ed Popko | 4 Jan 2017, 00:02 |
| Re: Lunerian Apprenticeship | Ed Popko | 9 Jan 2017, 13:48 |
| Re: Spaceship navigation | Ed Popko | 14 Jan 2017, 15:52 |
| Re: Updated Transcript of Worsley's Log | Ed Popko | 28 Jan 2017, 15:08 |
| Re: Updated Transcript of Worsley's Log | Ed Popko | 28 Jan 2017, 17:39 |
| Re: An artificial horizon opportunity? | Ed Popko | 28 Jan 2017, 20:46 |
| Re: CelNav on a Cruise Ship | Ed Popko | 21 Mar 2017, 16:34 |
| Re: Cape Belsham and Point Wild relocated on Chart 29104 | Ed Popko | 21 Mar 2017, 22:26 |
| Re: Two 19th century octants | Ed Popko | 24 Mar 2017, 23:42 |
| USNO Oceanography Portal down | Ed Popko | 2 Apr 2017, 12:35 |
| Gunther Rules for Navigation | Ed Popko | 17 Apr 2017, 22:51 |
| Re: Gunther Rules for Navigation | Ed Popko | 19 Apr 2017, 12:10 |
| Re: Gunther Rules for Navigation | Ed Popko | 20 Apr 2017, 19:40 |
| Re: Gunther Rules for Navigation | Ed Popko | 22 Apr 2017, 11:26 |
| Re: Gunther Rules for Navigation | Ed Popko | 23 Apr 2017, 12:21 |
| Re: A tour of the Great Navigation Centers of the World | Ed Popko | 23 Apr 2017, 19:30 |
| Re: Isaac Newton's Telescope | Ed Popko | 27 Apr 2017, 22:31 |
| Beautiful Jupiter Fly-by | Ed Popko | 8 Jun 2017, 11:57 |
| Marion-Bermuda Sailing event (with Celestial) | Ed Popko | 10 Jun 2017, 14:42 |
| Re: American Practical Navigator, Bowditch 2017 | Ed Popko | 13 Jun 2017, 11:15 |
| Re: USNO Data | Ed Popko | 29 Jul 2017, 22:05 |
| Re: Ode to Celestial Navigation | Ed Popko | 1 Aug 2017, 10:22 |
| Re: Polhemus computer | Ed Popko | 7 Aug 2017, 18:43 |
| Useful and interesting 1939 bibliography on Air/Sea Navigation | Ed Popko | 14 Aug 2017, 12:18 |
| What folks in varuous U.S. towns will see of the Aug 21 eclipse | Ed Popko | 16 Aug 2017, 13:03 |
| No Nautical Almanac data during Aug 21st eclipse | Ed Popko | 17 Aug 2017, 11:52 |
| Re: LED Street Lights - Rheostat reconditioning | Ed Popko | 29 Aug 2017, 10:18 |
| Re: Molasses as an artificial horizon | Ed Popko | 1 Oct 2017, 13:16 |
| Re: Molasses as an artificial horizon | Ed Popko | 1 Oct 2017, 18:08 |
| Re: Full moon sights and lifeboat sextant accuracy | Ed Popko | 4 Oct 2017, 23:41 |
| Re: Mirror adjustment tools | Ed Popko | 13 Oct 2017, 17:15 |
| Re: Mirror adjustment tools | Ed Popko | 14 Oct 2017, 13:05 |
| NavList Live session at the Navigation Symposium | Ed Popko | 1 Nov 2017, 11:21 |
| Re: NavList Live session at the Navigation Symposium | Ed Popko | 2 Nov 2017, 10:49 |
| Another reported GPS spoofing - ship disappears | Ed Popko | 3 Nov 2017, 11:32 |
| Re: Weems Star Altitude Curves | Ed Popko | 7 Nov 2017, 20:20 |
| Re: Mystic Navigation Symposium summary | Ed Popko | 19 Nov 2017, 11:31 |
| Going Loony with Lunars | Ed Popko | 30 Nov 2017, 23:09 |
| Re: GPS Anti Spoof app | Ed Popko | 5 Dec 2017, 15:46 |
| Re: Longitude by asteroid | Ed Popko | 7 Dec 2017, 21:25 |
| Re: Slide rule identification | Ed Popko | 12 Dec 2017, 17:31 |
| Re: Going Loony with Lunars | Ed Popko | 12 Dec 2017, 21:03 |
| Re: Going Loony with Lunars | Ed Popko | 12 Dec 2017, 23:17 |
| Re: Persistence and demise of Lunars | Ed Popko | 16 Dec 2017, 13:06 |
| Re: Hello from a New Member | Ed Popko | 18 Dec 2017, 13:54 |
| Re: A Lunar Example: Sun and Moon vertically aligned | Ed Popko | 19 Dec 2017, 18:29 |
| Re: A Lunar Example: Sun and Moon vertically aligned | Ed Popko | 21 Dec 2017, 11:35 |
| Re: A Lunar Example: Sun and Moon vertically aligned | Ed Popko | 22 Dec 2017, 18:20 |
| First Moon-Star Lunar | Ed Popko | 24 Dec 2017, 12:44 |
| Re: First Moon-Star Lunar | Ed Popko | 27 Dec 2017, 10:58 |
| Re: First Moon-Star Lunar | Ed Popko | 27 Dec 2017, 11:07 |
| Re: First Moon-Star Lunar | Ed Popko | 28 Dec 2017, 18:14 |
| Re: Polar Grid AirNav and Oceanic AirNav | Ed Popko | 29 Dec 2017, 13:34 |
| Re: First Moon-Star Lunar | Ed Popko | 29 Dec 2017, 16:20 |
| Re: First Moon-Star Lunar | Ed Popko | 31 Dec 2017, 11:44 |
| Re: GPS Anti Spoof app | Ed Popko | 8 Jan 2018, 20:20 |
| Re: GPS Anti Spoof app | Ed Popko | 9 Jan 2018, 11:35 |
| Re: Gnomonic Charts - Usable Zones | Ed Popko | 22 Jan 2018, 10:38 |
| Margetts' 1790 Longitude Tables | Ed Popko | 26 Jan 2018, 15:08 |
| Re: Margetts' 1790 Longitude Tables | Ed Popko | 26 Jan 2018, 20:28 |
| Oblateness calculation given observe r’s latitude | Ed Popko | 29 Jan 2018, 19:23 |
| Re: Oblateness calculation given observer's latitude | Ed Popko | 29 Jan 2018, 20:48 |
| Vacation-time Lunars | Ed Popko | 2 Feb 2018, 21:32 |
| Vacation-time Lunars (cont.) | Ed Popko | 3 Feb 2018, 12:29 |
| Re: Vacation-time Lunars | Ed Popko | 7 Feb 2018, 22:46 |
| Re: Location without DR | Ed Popko | 19 Feb 2018, 11:44 |
| Re: Location without DR | Ed Popko | 19 Feb 2018, 17:18 |
| Re: My introduction | Ed Popko | 20 Feb 2018, 11:08 |
| Polhemus in the Southern Hemisphere | Ed Popko | 2 Mar 2018, 13:41 |
| Re: Many EBAY Sextants Available | Ed Popko | 3 Mar 2018, 22:51 |
| Re: NASA and celestial navigation | Ed Popko | 6 Mar 2018, 10:59 |
| Re: Polhemus in the Southern Hemisphere | Ed Popko | 6 Mar 2018, 12:14 |
| Erasing E6-B and Polhemus Plots | Ed Popko | 9 Mar 2018, 16:40 |
| Re: Erasing E6-B and Polhemus Plots | Ed Popko | 10 Mar 2018, 10:45 |
| Busy night as workers adjust British henge sites for saving time | Ed Popko | 11 Mar 2018, 13:27 |
| Odd star brightness as seen from ISS night orbits | Ed Popko | 12 Mar 2018, 12:53 |
| Re: Erasing E6-B and Polhemus Plots | Ed Popko | 17 Mar 2018, 10:22 |
| Did chronometers introduce economics to navigation? | Ed Popko | 18 Mar 2018, 12:34 |
| Re: Nomogram for Dip Short of Horizon | Ed Popko | 18 Mar 2018, 22:54 |
| Time-lapse animation of the moon | Ed Popko | 22 Mar 2018, 20:46 |
| Beware of Noon Sights this time of Year | Ed Popko | 30 Mar 2018, 18:22 |
| Lunar-Distance correction for Oblateness | Ed Popko | 6 Apr 2018, 14:12 |
| Re: Lunar-Distance correction for Oblateness | Ed Popko | 6 Apr 2018, 20:24 |
| New York Times article on Viking Navigation and their use of "Sunstones" | Ed Popko | 8 Apr 2018, 10:34 |
| Re: Article: Inside the Worst U.S. Maritime Disaster in Decades | Ed Popko | 9 Apr 2018, 11:35 |
| Lunars: Altitude Accuracy (revisited) | Ed Popko | 9 Apr 2018, 16:37 |
| Video tour of our Moon | Ed Popko | 12 Apr 2018, 15:12 |
| Re: Lunars: this weekend at Mystic Seaport | Ed Popko | 17 Apr 2018, 00:59 |
| Re: Lunars: this weekend at Mystic Seaport | Ed Popko | 18 Apr 2018, 17:00 |
| Re: Lunars: this weekend at Mystic Seaport | Ed Popko | 19 Apr 2018, 10:15 |
| Lumpy lunar edge | Ed Popko | 20 Apr 2018, 18:08 |
| LOPs from Lunars | Ed Popko | 2 May 2018, 17:01 |
| Re: LOPs from Lunars | Ed Popko | 6 May 2018, 10:33 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 8 May 2018, 11:15 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 9 May 2018, 11:39 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 9 May 2018, 21:22 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 10 May 2018, 23:43 |
| Robin Knox-Johnston: The first man to sail non-stop solo around the world | Ed Popko | 12 May 2018, 11:28 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 12 May 2018, 21:01 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 14 May 2018, 11:07 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 14 May 2018, 17:51 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 14 May 2018, 20:31 |
| 19th c Local and Greenwich Time Conventions | Ed Popko | 15 May 2018, 12:48 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 15 May 2018, 20:05 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 16 May 2018, 00:21 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 16 May 2018, 21:48 |
| Time-sight time conventions | Ed Popko | 17 May 2018, 18:11 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 19 May 2018, 18:54 |
| Re: Time-sight time conventions | Ed Popko | 20 May 2018, 12:46 |
| Re: Longitude sight, South Pacific, 1864 | Ed Popko | 22 May 2018, 00:45 |
| Re: Time-sight time conventions | Ed Popko | 22 May 2018, 11:42 |
| Re: Sextants in space | Ed Popko | 23 May 2018, 17:25 |
| Re: Time-sight time conventions | Ed Popko | 23 May 2018, 20:59 |
| Re: Time-sight time conventions | Ed Popko | 25 May 2018, 14:52 |
| Re: Time-sight time conventions | Ed Popko | 25 May 2018, 18:01 |
| Re: Boeing Clipper 1930s | Ed Popko | 1 Jun 2018, 12:29 |
| Re: Boeing Clipper 1930s | Ed Popko | 1 Jun 2018, 15:58 |
| Chronology of Celestial Navigation and Related Topics | Ed Popko | 8 Jun 2018, 10:57 |
| Re: Chronology of Celestial Navigation and Related Topics | Ed Popko | 8 Jun 2018, 14:25 |
| Re: Chronology of Celestial Navigation and Related Topics | Ed Popko | 9 Jun 2018, 09:29 |
| Re: C Plath Sextant | Ed Popko | 9 Jun 2018, 19:11 |
| Re: Chronology of Celestial Navigation and Related Topics (Update 1) | Ed Popko | 10 Jun 2018, 11:19 |
| Re: Chronology of Celestial Navigation and Related Topics | Ed Popko | 10 Jun 2018, 18:11 |
| Re: Chronology of Celestial Navigation and Related Topics | Ed Popko | 10 Jun 2018, 18:21 |
| Re: Movie Adrift | Ed Popko | 11 Jun 2018, 10:19 |
| Re: Shortwave radio and the evolution of celestial navigation | Ed Popko | 12 Jun 2018, 20:38 |
| Re: Shortwave radio and the evolution of celestial navigation | Ed Popko | 13 Jun 2018, 10:26 |
| Bubble sextant patents | Ed Popko | 17 Jun 2018, 11:09 |
| Determining refraction in 19th Century | Ed Popko | 21 Jun 2018, 10:37 |
| Re: Determining refraction in 19th Century | Ed Popko | 22 Jun 2018, 00:25 |
| Re: Longitude Sight, South Pacific, 1864 - Revisited | Ed Popko | 27 Jun 2018, 10:53 |
| Re: What Three Words at sea | Ed Popko | 30 Jun 2018, 11:48 |
| Year USNO launched Celestial Navigation Data webpage | Ed Popko | 2 Jul 2018, 21:35 |
| Re: Starting a poem for Lunars & a new wobbly sight platform. | Ed Popko | 4 Jul 2018, 10:05 |
| Re: Reading degrees on a sextant | Ed Popko | 14 Jul 2018, 11:12 |
| Re: Did transistors transform celestial navigation? | Ed Popko | 14 Jul 2018, 15:49 |
| 19th century navigation time systems | Ed Popko | 15 Jul 2018, 07:01 |
| Re: Shiny and golden? It's not a real sextant | Ed Popko | 15 Jul 2018, 19:07 |
| Re: Venus Moon CPA Tonight | Ed Popko | 16 Jul 2018, 09:56 |
| Re: Radio time signals disappear | Ed Popko | 27 Aug 2018, 22:16 |
| Re: Is Celestial Navigation really a backup to GPS Navigation? | Ed Popko | 21 Sep 2018, 13:52 |
| Lindbergh-Weems Second-Setting Watch | Ed Popko | 21 Sep 2018, 14:08 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 22 Sep 2018, 10:05 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 22 Sep 2018, 10:07 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 23 Sep 2018, 14:09 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 23 Sep 2018, 20:05 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 25 Sep 2018, 22:20 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 26 Sep 2018, 11:00 |
| Re: Lindbergh-Weems Second-Setting Watch | Ed Popko | 26 Sep 2018, 18:21 |
| Re: Susceptibility of GPS to CME, Rationale for CN? | Ed Popko | 1 Oct 2018, 17:30 |
| On the use of Lindbergh-Weems second-setting navigation watch | Ed Popko | 14 Oct 2018, 12:31 |
| Re: Software tool for Celestial Nav Training - a report | Ed Popko | 14 Oct 2018, 19:31 |
| Re: Position lines with confidence weights | Ed Popko | 19 Oct 2018, 18:28 |
| Lindbergh-Weems Navigaiton Watch Gotchas | Ed Popko | 22 Oct 2018, 14:31 |
| Re: Lindbergh-Weems Navigaiton Watch Gotchas | Ed Popko | 22 Oct 2018, 22:04 |
| Navigation jokes | Ed Popko | 25 Oct 2018, 21:40 |
| Re: Navigation jokes | Ed Popko | 26 Oct 2018, 01:47 |
| Re: Navigation Conference, Mystic Seaport, 2019? | Ed Popko | 31 Oct 2018, 10:13 |
| Latitude by Talcott-Horrebow Method | Ed Popko | 2 Nov 2018, 17:25 |
| Re: Latitude by Talcott-Horrebow Method | Ed Popko | 2 Nov 2018, 20:17 |
| Re: Latitude by Talcott-Horrebow Method | Ed Popko | 5 Nov 2018, 11:13 |
| Re: Latitude by Talcott-Horrebow Method | Ed Popko | 5 Nov 2018, 15:27 |
| Life raft questions - knowing only GHA and sun's rising or setting | Ed Popko | 7 Nov 2018, 16:03 |
| Re: Life raft questions - knowing only GHA and sun's rising or setting | Ed Popko | 8 Nov 2018, 11:27 |
| Sexagesimal vs Degree-minute-tenths of minutes angles | Ed Popko | 15 Nov 2018, 11:03 |
| Re: Degree Calculator | Ed Popko | 25 Nov 2018, 11:09 |
| Lindbergh-Weems Second-Setting Watch -- Notes on Design and Use | Ed Popko | 26 Nov 2018, 10:59 |
| Re: The Mark I at Harvard First Programmable Computer in the United States aka "Bessie" | Ed Popko | 7 Dec 2018, 12:10 |
| Lunars during a Lunar Eclipse | Ed Popko | 11 Dec 2018, 12:00 |
| Re: Floating-Point 4-place Nat-Haversine Table | Ed Popko | 13 Dec 2018, 11:06 |
| Re: Spur of the moment long by chron | Ed Popko | 16 Dec 2018, 11:31 |
| Re: Published, Shackleton and Worsley, Journey to South Georgia Island | Ed Popko | 20 Dec 2018, 15:26 |
| Re: Published, Shackleton and Worsley, Journey to South Georgia Island | Ed Popko | 21 Dec 2018, 14:48 |
| Re: Lunars during a Lunar Eclipse | Ed Popko | 29 Dec 2018, 11:21 |
| Re: Lunars during a Lunar Eclipse | Ed Popko | 29 Dec 2018, 20:01 |
| Re: Weems Second Setting Navigation Watch | Ed Popko | 30 Dec 2018, 19:01 |
| Re: Welcome to the New Year | Ed Popko | 1 Jan 2019, 22:08 |
| Re: A lunar in 1845 | Ed Popko | 2 Jan 2019, 11:47 |
| Re: A lunar in 1845 | Ed Popko | 3 Jan 2019, 12:02 |
| Re: A lunar in 1845 | Ed Popko | 4 Jan 2019, 13:57 |
| Re: A lunar in 1845 | Ed Popko | 4 Jan 2019, 20:11 |
| Re: Noticed by the James Caird Society! | Ed Popko | 9 Jan 2019, 17:15 |
| Re: Moby Dick Tales | Ed Popko | 9 Jan 2019, 23:22 |
| Re: Moby Dick Tales | Ed Popko | 10 Jan 2019, 16:23 |
| Re: Life on the Ocean | Ed Popko | 14 Jan 2019, 22:43 |
| Lunars on eclipse day, IE surprise and time brackets | Ed Popko | 24 Jan 2019, 14:58 |
| Re: Lunars on eclipse day, IE surprise and time brackets | Ed Popko | 24 Jan 2019, 20:17 |
| Re: In memoriam: Stan Klein | Ed Popko | 27 Jan 2019, 22:33 |
| With the aid of CN, Van Den Heede wins the Golden Globe round-the-world race | Ed Popko | 30 Jan 2019, 11:09 |
| Re: Moon, Venus and Jupiter today | Ed Popko | 2 Feb 2019, 12:22 |
| Re: Moon, Venus and Jupiter today | Ed Popko | 2 Feb 2019, 22:01 |
| Re: Moon, Venus and Jupiter today | Ed Popko | 3 Feb 2019, 16:58 |
| Re: Moon, Venus and Jupiter today | Ed Popko | 5 Feb 2019, 19:52 |
| Re: ADMIN NavList on small screens | Ed Popko | 6 Feb 2019, 12:43 |
| Re: ADMIN NavList on small screens | Ed Popko | 6 Feb 2019, 23:01 |
| Re: Northern Limits of Magnetic Compass Usefulness | Ed Popko | 8 Feb 2019, 12:55 |
| Re: Moon, Venus and Jupiter today | Ed Popko | 10 Feb 2019, 13:09 |
| Re: CP-300/U Star Finder | Ed Popko | 18 Feb 2019, 13:26 |
| Re: CP-300/U Star Finder | Ed Popko | 18 Feb 2019, 19:51 |
| Re: GPS for chickens and spinach | Ed Popko | 25 Feb 2019, 00:50 |
| Re: Magnetic variation changing faster than anticipated | Ed Popko | 28 Feb 2019, 11:52 |
| Re: Wind Velocity from Three Drifts | Ed Popko | 3 Mar 2019, 17:22 |
| Re: CP-300/U Star Finder | Ed Popko | 24 Mar 2019, 09:48 |
| Re: CP-300/U Star Finder | Ed Popko | 26 Mar 2019, 15:34 |
| Re: Possible GPS Date Rollover problems week of April 6, 2019 | Ed Popko | 26 Mar 2019, 20:52 |
| Re: Cpu-50A/P | Ed Popko | 29 Mar 2019, 10:44 |
| Re: Wikipedia article on Winslow Homer's "Eight Bells" | Ed Popko | 10 Apr 2019, 10:40 |
| Re: Mariner's astrolabe from Museo Naval de Madrid | Ed Popko | 11 Apr 2019, 09:52 |
| Re: Northern Limits of Magnetic Compass Usefulness | Ed Popko | 12 Apr 2019, 09:42 |
| Re: Sextant use on tanker | Ed Popko | 13 Apr 2019, 21:21 |
| Early Air Navigation with RDF | Ed Popko | 16 Apr 2019, 23:03 |
| Re: Early Air Navigation with RDF | Ed Popko | 18 Apr 2019, 10:30 |
| First commercial aircraft with GPS | Ed Popko | 20 Apr 2019, 10:05 |
| Re: First commercial aircraft with GPS | Ed Popko | 22 Apr 2019, 12:33 |
| Re: Early Air Navigation with RDF | Ed Popko | 22 Apr 2019, 13:28 |
| Re: Polariser (photo) filter as a sextant shade - my experience. | Ed Popko | 27 Apr 2019, 16:31 |
| The Sextant ... | Ed Popko | 27 Apr 2019, 21:13 |
| Re: Life on the Ocean | Ed Popko | 6 May 2019, 09:42 |
| Logarithms: adding ten | Ed Popko | 11 May 2019, 10:44 |
| Re: Logarithms: adding ten | Ed Popko | 16 May 2019, 23:09 |
| Sextant adjustment (again) | Ed Popko | 16 May 2019, 23:45 |
| Re: Easy star-to-star distance corrections | Ed Popko | 23 May 2019, 21:52 |
| CP-300/U USAF Star Finder | Ed Popko | 30 May 2019, 16:07 |
| Re: CP-300/U USAF Star Finder | Ed Popko | 1 Jun 2019, 12:22 |
| US WW2 Fairchild Maxson Mk1 Line of Position Navigational Computer | Ed Popko | 1 Jun 2019, 16:12 |
| Re: Radar sundial | Ed Popko | 6 Jun 2019, 23:48 |
| Greenwich 19th and 20th c conventions | Ed Popko | 10 Jun 2019, 13:16 |
| Re: How to round? | Ed Popko | 14 Jun 2019, 00:23 |
| Re: CP-300/U USAF Star Finder | Ed Popko | 27 Jun 2019, 10:52 |
| Re: Coordinate precision | Ed Popko | 3 Jul 2019, 09:47 |
| Optical bench for sextants? | Ed Popko | 4 Jul 2019, 19:18 |
| Re: Apollo Sextant | Ed Popko | 21 Jul 2019, 11:54 |
| Re: Apollo Sextant | Ed Popko | 21 Jul 2019, 12:04 |
| Re: Mirror AH - safety first | Ed Popko | 24 Jul 2019, 01:13 |
| Re: Celestial Navigation Triptych | Ed Popko | 24 Jul 2019, 10:19 |
| Robert Ballard, Titanic discoverer, seeks Amelia Earhart's plane | Ed Popko | 25 Jul 2019, 01:00 |
| Re: Robert Ballard, Titanic discoverer, seeks Amelia Earhart's plane | Ed Popko | 25 Jul 2019, 19:24 |
| Re: Robert Ballard, Titanic discoverer, seeks Amelia Earhart's plane | Ed Popko | 26 Jul 2019, 18:53 |
| Re: Mirror AH - safety first | Ed Popko | 27 Jul 2019, 14:52 |
| Cones of Position, Lunars and the Apollo Sextant | Ed Popko | 2 Aug 2019, 19:23 |
| Re: Cones of Position, Lunars and the Apollo Sextant | Ed Popko | 4 Aug 2019, 12:42 |
| Re: An artificial horizon eclipse sight | Ed Popko | 5 Aug 2019, 19:07 |
| Re: An artificial horizon eclipse sight | Ed Popko | 7 Aug 2019, 14:14 |
| Sextant octant rubber eyepad preservation | Ed Popko | 14 Aug 2019, 10:22 |
| Re: Sextant octant rubber eyepad preservation | Ed Popko | 14 Aug 2019, 18:58 |
| Re: Navigation articles on Wikipedia | Ed Popko | 29 Aug 2019, 09:53 |
| Re: What is a good sextant to buy? | Ed Popko | 3 Sep 2019, 23:00 |
| Re: Age of Sail Navigation Weekend and a Lunars Day | Ed Popko | 16 Sep 2019, 23:22 |
| Mie scattering, not refraction | Ed Popko | 25 Sep 2019, 17:07 |
| Re: Celestial Navigation in the Movies | Ed Popko | 5 Oct 2019, 10:57 |
| Re: In the Wake of Magellan | Ed Popko | 11 Oct 2019, 11:39 |
| Re: In the Wake of Magellan | Ed Popko | 13 Oct 2019, 10:04 |
| Re: Problem shooting index error | Ed Popko | 14 Oct 2019, 14:46 |
| Re: USNO website outages | Ed Popko | 20 Oct 2019, 17:14 |
| Eyeglasses and Sextants | Ed Popko | 22 Oct 2019, 19:02 |
| Re: Eyeglasses and Sextants | Ed Popko | 24 Oct 2019, 15:51 |
| Re: CN & global ocean currents | Ed Popko | 31 Oct 2019, 17:35 |
| Re: Eyeglasses and Sextants | Ed Popko | 3 Nov 2019, 23:09 |
| Re: Yet another another sextant | Ed Popko | 19 Nov 2019, 15:06 |
| Re: DSLR Camera Venus Lunar | Ed Popko | 29 Nov 2019, 18:41 |
| Re: Watching a star for IE: an obturator trick? | Ed Popko | 11 Dec 2019, 00:23 |
| Re: Bob Goethe's Mark 2 Navigators slide rule, test drive comparisons. | Ed Popko | 16 Dec 2019, 11:40 |
| Re: Do you Beidou? | Ed Popko | 19 Dec 2019, 20:27 |
| Re: Homemade plotting sheets | Ed Popko | 20 Dec 2019, 00:54 |
| Re: Correcting for the movement of an observer: a plausible explanation? | Ed Popko | 23 Dec 2019, 12:09 |
| Re: Stellarium, refraction, HP | Ed Popko | 10 Jan 2020, 11:23 |
| Re: Stellarium, refraction, HP | Ed Popko | 11 Jan 2020, 12:39 |
| Reed's Lunars Calculator Anniversary | Ed Popko | 11 Jan 2020, 12:46 |
| Re: Stellarium, refraction, HP | Ed Popko | 12 Jan 2020, 00:09 |
| Re: Reed's Lunars Calculator Anniversary | Ed Popko | 12 Jan 2020, 00:15 |
| Re: Stellarium, refraction, HP | Ed Popko | 15 Jan 2020, 13:10 |
| Re: Stellarium, refraction, HP | Ed Popko | 15 Jan 2020, 23:47 |
| Re: Bausch and Lomb WWII Aircraft Sextants | Ed Popko | 20 Jan 2020, 17:01 |
| Re: Cosine formula to solve a right spherical triangle? | Ed Popko | 26 Jan 2020, 12:36 |
| Re: Celestial navigation: easier basic principle? | Ed Popko | 27 Jan 2020, 10:56 |
| Re: Sky & Telescope Magazine article on Capt. Cook's Astronomy | Ed Popko | 29 Jan 2020, 21:26 |
| Re: Moon Venus Lunar - Interpretation of results | Ed Popko | 31 Jan 2020, 12:36 |
| A-12 Experiences | Ed Popko | 9 Feb 2020, 11:44 |
| Re: A-12 Experiences | Ed Popko | 10 Feb 2020, 00:57 |
| Re: A-12 Experiences | Ed Popko | 10 Feb 2020, 01:06 |
| Re: A-12 Experiences | Ed Popko | 11 Feb 2020, 13:36 |
| Re: A-12 Experiences | Ed Popko | 12 Feb 2020, 11:12 |
| Re: Sun Slow Day | Ed Popko | 12 Feb 2020, 11:23 |
| Re: What does the Analemma depict? | Ed Popko | 13 Feb 2020, 13:35 |
| Using the sun's direct and reflected image to determine a sextant's IE | Ed Popko | 9 Mar 2020, 12:59 |
| Re: Using the sun's direct and reflected image to determine a sextant's IE | Ed Popko | 9 Mar 2020, 20:23 |
| Re: Using the sun's direct and reflected image to determine a sextant's IE | Ed Popko | 10 Mar 2020, 11:46 |
| Re: Kelvin Hughes sounding sextant ! | Ed Popko | 17 Mar 2020, 16:51 |
| GPS Anti Spoof Pro | Ed Popko | 24 Mar 2020, 10:59 |
| Re: Weems and Plath Celestial Slide Rule | Ed Popko | 10 Apr 2020, 14:51 |
| Re: Radio from the middle of nowhere | Ed Popko | 29 Apr 2020, 12:10 |
| NavList Hams | Ed Popko | 2 May 2020, 11:20 |
| Re: Hav-Doniol re-visited | Ed Popko | 6 May 2020, 13:46 |
| BBC - Scientists explain magnetic pole's wanderings | Ed Popko | 11 May 2020, 17:09 |
| Re: Plot Sheet Generator | Ed Popko | 17 Jul 2020, 10:45 |
| Re: NavList Hams | Ed Popko | 17 Jul 2020, 11:00 |
| Re: USNO web app cloned | Ed Popko | 18 Sep 2020, 11:42 |
| Re: Experience with an artifical horizon | Ed Popko | 18 Oct 2020, 13:38 |
| Re: 24MP DSLR 35mm Lunars | Ed Popko | 18 Oct 2020, 13:41 |
| Heavenly Mathematics - The Forgotten Art of Spherical Trigonometry | Ed Popko | 24 Oct 2020, 15:35 |
| Curious star charts | Ed Popko | 16 Nov 2020, 15:13 |
| Re: Curious star charts | Ed Popko | 17 Nov 2020, 22:27 |
| Re: Curious star charts | Ed Popko | 21 Nov 2020, 14:02 |
| Re: I'm forever blowing (sextant) bubbles | Ed Popko | 25 Nov 2020, 17:40 |
| Moon Phases 2021 Including Libration and Position Angle | Ed Popko | 12 Jan 2021, 18:54 |
| Re: CP-300/U USAF Star Finder | Ed Popko | 23 Jan 2021, 12:21 |
| Polhemus Celestial Computer and Coriolis Correction | Ed Popko | 24 Jan 2021, 00:09 |
| Re: Polhemus Celestial Computer and Coriolis Correction | Ed Popko | 24 Jan 2021, 10:43 |
| Re: Polhemus Celestial Computer and Coriolis Correction | Ed Popko | 25 Jan 2021, 16:38 |
| Re: Astrolabes | Ed Popko | 26 Jan 2021, 12:46 |
| Sun's Blue and Golden Hours | Ed Popko | 15 Feb 2021, 13:38 |
| Re: Sun's Blue and Golden Hours | Ed Popko | 16 Feb 2021, 15:28 |
| The Where's Amelia Earhart drama continues | Ed Popko | 4 Mar 2021, 14:17 |
| Re: DIY Starfinder - a lockdown project | Ed Popko | 4 Mar 2021, 22:42 |
| Re: Wind Velocity from Three Drifts | Ed Popko | 9 Mar 2021, 12:03 |
| Re: Wind Velocity from Three Drifts | Ed Popko | 11 Mar 2021, 23:59 |
| The Ancient Greek Antikythera Mechanism | Ed Popko | 13 Mar 2021, 13:48 |
| Re: The Ancient Greek Antikythera Mechanism | Ed Popko | 13 Mar 2021, 21:23 |
| Backpackers discover the Nocturnal | Ed Popko | 3 Apr 2021, 22:21 |
| HarvardX offers free online course "PredictionX: Lost Without Longitude" | Ed Popko | 30 Apr 2021, 16:38 |
| Re: HarvardX offers free online course "PredictionX: Lost Without Longitude" | Ed Popko | 1 May 2021, 18:18 |
| Re: HarvardX offers free online course "PredictionX: Lost Without Longitude" | Ed Popko | 3 May 2021, 11:20 |
| Re: Eclipse Fix | Ed Popko | 5 Jun 2021, 19:42 |
| Re: Sunclock apparatus | Ed Popko | 12 Jun 2021, 12:56 |
| Re: Selling an A-12 bubble sextant | Ed Popko | 11 Jul 2021, 17:27 |
| Re: J S Letcher and Lunars | Ed Popko | 9 Sep 2021, 14:29 |
| Re: J S Letcher and Lunars | Ed Popko | 9 Sep 2021, 15:15 |
| Re: Link A-12 Sextant For Sale | Ed Popko | 9 Sep 2021, 15:17 |
| Re: Link A-12 Sextant For Sale | Ed Popko | 9 Sep 2021, 19:27 |
| Status of USNO's Celestial Navigation Data web site | Ed Popko | 25 Sep 2021, 14:38 |
| Re: Compare Methods: Lat/Lon Near Noon | Ed Popko | 1 Oct 2021, 15:36 |
| Re: Compare Methods: Lat/Lon Near Noon | Ed Popko | 1 Oct 2021, 22:01 |
| Re: Compare Methods: Lat/Lon Near Noon | Ed Popko | 1 Oct 2021, 22:13 |
| Re: Compare Methods: Lat/Lon Near Noon | Ed Popko | 2 Oct 2021, 14:31 |
| Finding IC for A-12 bubble sextants | Ed Popko | 5 Oct 2021, 13:43 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 5 Oct 2021, 22:27 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 5 Oct 2021, 22:29 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 6 Oct 2021, 10:41 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 6 Oct 2021, 15:59 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 9 Oct 2021, 17:31 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 10 Oct 2021, 16:54 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 11 Oct 2021, 14:40 |
| Re: Finding IC for A-12 bubble sextants | Ed Popko | 13 Oct 2021, 13:39 |
| Re: A day's work in 1937 onboard the barque Alastor | Ed Popko | 23 Oct 2021, 22:25 |
| Re: Star Constellation Jigsaw Puzzle | Ed Popko | 31 Oct 2021, 23:40 |
| Re: Calculate new coordinates given bearing and distance? | Ed Popko | 5 Nov 2021, 12:24 |
| Re: The Bajo "Sea Nomads" and the stars | Ed Popko | 5 Nov 2021, 21:23 |
| Re: Calculate new coordinates given bearing and distance? | Ed Popko | 6 Nov 2021, 12:42 |
| Re: Calculate new coordinates given bearing and distance? | Ed Popko | 9 Nov 2021, 20:21 |
| Lindbergh-Weems Second-Setting Pilot's Watch - Updated Paper | Ed Popko | 12 Nov 2021, 22:11 |
| Re: Lindbergh-Weems Second-Setting Pilot's Watch -Updated Paper | Ed Popko | 17 Nov 2021, 21:14 |
| Remembering Don Treworgy | Ed Popko | 23 Nov 2021, 14:42 |
| Re: EoT Curve calculated by VB | Ed Popko | 23 Nov 2021, 23:28 |
| Re: A10 sextant for sale | Ed Popko | 13 Dec 2021, 21:09 |
| Re: Traditional Wayfinding | Ed Popko | 24 Dec 2021, 13:36 |
| Re: Air Navigation, Local Hour Angle Type X-1 computer | Ed Popko | 30 Dec 2021, 13:43 |
| Air Navigation Began With Concrete Arrows, by Robert Novell | Ed Popko | 31 Dec 2021, 14:26 |
| Re: Bermuda to St Helena on a North Atlantic Mercator Chart | Ed Popko | 31 Dec 2021, 15:29 |
| Re: Bermuda to St Helena on a North Atlantic Mercator Chart | Ed Popko | 2 Jan 2022, 15:26 |
| Satellite star trackers | Ed Popko | 8 Jan 2022, 14:43 |
| Re: Traditional Wayfinding | Ed Popko | 15 Jan 2022, 17:52 |
| Ship Identified as Captain Cook's Endeavour | Ed Popko | 3 Feb 2022, 15:23 |
| Interpreting ship and chronometer times in 19th century Time Sights | Ed Popko | 9 Feb 2022, 19:29 |
| Terminator Moon | Ed Popko | 16 Feb 2022, 20:45 |
| Re: Lindbergh-Weems Second-Setting Pilot's Watch -Updated Paper | Ed Popko | 25 Feb 2022, 22:15 |
| Re: Will anyone ever find Shackleton's lost ship? | Ed Popko | 27 Feb 2022, 00:38 |
| Re: Tripod Mirror Artificial Horizon | Ed Popko | 3 Mar 2022, 13:29 |
| Re: Will anyone ever find Shackleton's lost ship? | Ed Popko | 9 Mar 2022, 10:55 |
| Re: Daylight Venus and Daylight Saving | Ed Popko | 14 Mar 2022, 12:33 |
| Re: Kollsman Periscopic Mount F.S. on eBay | Ed Popko | 26 Mar 2022, 00:08 |
| Re: Kollsman Periscopic Mount F.S. on eBay | Ed Popko | 27 Mar 2022, 15:32 |
| Kollsman Periscopic Sextants | Ed Popko | 31 Mar 2022, 14:36 |
| Kollsman Periscope Sextant and Polhemus Celestial Computer Bearings | Ed Popko | 9 Apr 2022, 17:18 |
| Kollsman's Azimuth Counter and TH Bearings Relationship | Ed Popko | 18 Apr 2022, 13:02 |
| Re: Kollsman's Azimuth Counter and TH Bearings Relationship | Ed Popko | 19 Apr 2022, 00:16 |
| Re: Kollsman's Azimuth Counter and TH Bearings Relationship | Ed Popko | 20 Apr 2022, 23:14 |
| Re: Kollsman's Azimuth Counter and TH Bearings Relationship | Ed Popko | 21 Apr 2022, 15:17 |
| Statistical analysis of sight data to improve personal technique | Ed Popko | 4 May 2022, 17:26 |
| Re: Statistical analysis of sight data to improve personal technique | Ed Popko | 5 May 2022, 17:05 |
| Most Probable Position (MPP) | Ed Popko | 14 May 2022, 21:46 |
| Ultimate Lunars | Ed Popko | 7 Jun 2022, 23:32 |
| Re: Vernier explanation | Ed Popko | 24 Jun 2022, 22:55 |
| Re: Vernier explanation | Ed Popko | 25 Jun 2022, 20:43 |
| Re: Vernier explanation | Ed Popko | 27 Jun 2022, 14:25 |
| Re: Vernier explanation | Ed Popko | 29 Jun 2022, 22:16 |
| Lunars and corner cosines | Ed Popko | 17 Jul 2022, 17:50 |
| Air Navigation Computers, a book from the Oughtred Society | Ed Popko | 27 Jul 2022, 13:51 |
| A (not so) Brief History of Lunar Distances | Ed Popko | 31 Jul 2022, 19:28 |
| Re: A (not so) Brief History of Lunar Distances | Ed Popko | 1 Aug 2022, 15:44 |
| A Digital Sundial | Ed Popko | 26 Aug 2022, 19:36 |
| Re: Nautical Almanac direct US purchase | Ed Popko | 30 Sep 2022, 23:44 |
| Re: Nautical Almanac direct US purchase | Ed Popko | 1 Oct 2022, 21:49 |
| Re: The Book of the Sextant, Hughes, 1915 | Ed Popko | 21 Oct 2022, 12:28 |
| Daily value of the Equation of Time | Ed Popko | 22 Oct 2022, 13:33 |
| Re: Daily value of the Equation of Time | Ed Popko | 23 Oct 2022, 14:29 |
| Re: Daily value of the Equation of Time | Ed Popko | 23 Oct 2022, 14:30 |
| Re: Daily value of the Equation of Time | Ed Popko | 24 Oct 2022, 00:30 |
| Whaling log books, prime navigation & climate change sources | Ed Popko | 6 Nov 2022, 20:08 |
| Re: Star sight planning with star charts | Ed Popko | 11 Dec 2022, 15:02 |
| Re: Nautical Almanac direct US purchase | Ed Popko | 13 Dec 2022, 14:46 |
| Re: Artificial Horizon liquid? | Ed Popko | 11 Jan 2023, 16:24 |
| NA Moon Hs Dec refresh | Ed Popko | 26 Jan 2023, 15:44 |
| US GPO Nautical Almanac for 2023 is out of print | Ed Popko | 26 Jan 2023, 17:37 |
| Finding GMT/UT from Occultations | Ed Popko | 7 Mar 2023, 23:20 |
| Re: Finding GMT/UT from Occultations | Ed Popko | 10 Mar 2023, 19:28 |
| Re: Finding GMT/UT from Occultations | Ed Popko | 11 Mar 2023, 17:46 |
| Re: Finding GMT/UT from Occultations | Ed Popko | 11 Mar 2023, 22:45 |
| Charles W Morgan time sight | Ed Popko | 15 Mar 2023, 15:54 |
| Odd USNO web app clone results | Ed Popko | 24 Mar 2023, 14:42 |
| Re: Odd USNO web app clone results | Ed Popko | 25 Mar 2023, 16:33 |
| Re: ChatGPT taking over management of NavList | Ed Popko | 3 Apr 2023, 13:50 |
| There are nav aids and then there are nav aids | Ed Popko | 4 Apr 2023, 13:44 |
| Re: There are nav aids and then there are nav aids | Ed Popko | 7 Apr 2023, 11:56 |
| Canada abruptly ends time signal | Ed Popko | 14 Oct 2023, 12:59 |
| Re: Astrolabe Auction | Ed Popko | 1 Nov 2023, 18:27 |
Index includes 536 messages.
