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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

April, 2018

Index includes 190 messages. Sorted by date, recent messages last.

                    
Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayFrank Reed1 Apr 2018, 00:55
Re: Celestial SimulatorPhil Sadler1 Apr 2018, 02:56
Re: Polarized Sunglasses for CNGeoffrey Kolbe1 Apr 2018, 05:51
Re: Two Suns on the Horizon?Nick M1 Apr 2018, 12:38
Re: Two Suns on the Horizon?Frank Reed1 Apr 2018, 16:59
Re: Upon Oceans endorsementWilliam A1 Apr 2018, 20:22
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayWilliam A1 Apr 2018, 20:27
Re: Two Suns on the Horizon?Tony Oz1 Apr 2018, 21:50
Re: Polarized Sunglasses for CNTony Oz1 Apr 2018, 22:02
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayDon Seltzer1 Apr 2018, 22:46
Re: Celestial SimulatorPaul Hirose1 Apr 2018, 23:22
Re: Polarized Sunglasses for CNGreg Rudzinski1 Apr 2018, 23:56
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayDon Seltzer1 Apr 2018, 23:58
Sight reduction using a calculator's POL (arctan2) keyRobert Bernecky2 Apr 2018, 13:37
Re: Sight reduction using a calculator's POL (arctan2) keyGreg Rudzinski2 Apr 2018, 23:49
Re: Celestial SimulatorPhil Sadler3 Apr 2018, 02:44
Nautical Almanac, HO 229 or HO 249Lindsey Philpott3 Apr 2018, 05:34
Re: Nautical Almanac, HO 229 or HO 249Robert VanderPol II3 Apr 2018, 06:19
JPL ephemeresis and Nautical Almanac - speed of light questionRafal O.3 Apr 2018, 07:50
Google Honors John Harrison with "Doodle"Sean C3 Apr 2018, 08:46
Re: Sight reduction using a calculator's POL (arctan2) keyTony Oz3 Apr 2018, 08:49
Re: JPL ephemeresis and Nautical Almanac - speed of light questionTony Oz3 Apr 2018, 10:20
Re: JPL ephemeresis and Nautical Almanac - speed of light questionMike Mayer3 Apr 2018, 12:24
Re: Sight reduction using a calculator's POL (arctan2) keyRobin Stuart3 Apr 2018, 12:30
Re: JPL ephemeresis and Nautical Almanac - speed of light questionRafal O.3 Apr 2018, 12:50
Re: JPL ephemeresis and Nautical Almanac - speed of light questionPeter Monta3 Apr 2018, 12:51
Re: JPL ephemeresis and Nautical Almanac - speed of light questionRafal O.3 Apr 2018, 13:14
Re: Sight reduction using a calculator's POL (arctan2) keyGreg Rudzinski3 Apr 2018, 17:27
Re: JPL ephemeresis and Nautical Almanac - speed of light questionTony Oz3 Apr 2018, 17:28
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayWolfgang Köberer3 Apr 2018, 18:12
Re: Sight reduction using a calculator's POL (arctan2) keyRobert Bernecky3 Apr 2018, 18:51
Re: JPL ephemeresis and Nautical Almanac - speed of light questionJohn D. Howard3 Apr 2018, 19:10
Re: JPL ephemeresis and Nautical Almanac - speed of light questionBrad Morris3 Apr 2018, 19:10
Re: Google Honors John Harrison with "Doodle"Brad Morris3 Apr 2018, 19:19
Re: JPL ephemeresis and Nautical Almanac - speed of light questionBrad Morris3 Apr 2018, 19:38
Re: JPL ephemeresis and Nautical Almanac - speed of light questionFrank Reed3 Apr 2018, 19:39
Re: Nautical Almanac, HO 229 or HO 249Lindsey Philpott3 Apr 2018, 21:32
Re: Sight reduction using a calculator's POL (arctan2) keyLars Bergman3 Apr 2018, 21:40
Re: JPL ephemeresis and Nautical Almanac - speed of light questionJohn D. Howard3 Apr 2018, 22:15
Re: Nautical Almanac, HO 229 or HO 249John D. Howard3 Apr 2018, 22:38
Re: JPL ephemeresis and Nautical Almanac - speed of light questionRafal O.4 Apr 2018, 06:34
Re: JPL ephemeresis and Nautical Almanac - speed of light questionRafal O.4 Apr 2018, 07:08
Re: JPL ephemeresis and Nautical Almanac - speed of light questionPaul Hughes4 Apr 2018, 09:34
Re: Sight reduction using a calculator's POL (arctan2) keyRobin Stuart4 Apr 2018, 11:57
Re: JPL ephemeresis and Nautical Almanac - speed of light questionFrank Reed4 Apr 2018, 16:29
Quick Estimate of Sun DeclinationFrank Reed5 Apr 2018, 02:06
Re: Sight reduction using a calculator's POL (arctan2) keyGreg Rudzinski5 Apr 2018, 04:19
Re: JPL ephemeresis and Nautical Almanac - speed of light questionPaul Hirose5 Apr 2018, 04:56
Re: Quick Estimate of Sun DeclinationHerman Dekker5 Apr 2018, 10:20
Universal Plotting Sheet at High LatitudesBob Goethe5 Apr 2018, 11:36
Re: Sight reduction using a calculator's POL (arctan2) keyTony Oz5 Apr 2018, 13:07
Re: Quick Estimate of Sun Declination: analemmas?max mulhern5 Apr 2018, 15:12
Re: Quick Estimate of Sun Declination: analemmas?Frank Reed5 Apr 2018, 16:02
Re: Quick Estimate of Sun DeclinationFrank Reed5 Apr 2018, 18:49
Re: Quick Estimate of Sun DeclinationTony Oz5 Apr 2018, 18:52
Re: Sight reduction using a calculator's POL (arctan2) keyLars Bergman5 Apr 2018, 20:35
Re: Quick Estimate of Sun Declination: analemmas?max mulhern6 Apr 2018, 13:47
Lunar-Distance correction for OblatenessEd Popko6 Apr 2018, 14:12
Second hand sextant adviceEdward Colonna6 Apr 2018, 15:36
Re: Lunar-Distance correction for OblatenessFrank Reed6 Apr 2018, 18:48
Re: Second hand sextant adviceFrank Reed6 Apr 2018, 18:59
Re: Second hand sextant adviceChris Caswell6 Apr 2018, 19:06
Re: Second hand sextant adviceKen Gebhart6 Apr 2018, 19:10
Re: Second hand sextant adviceGreg Rudzinski6 Apr 2018, 20:10
Re: Lunar-Distance correction for OblatenessEd Popko6 Apr 2018, 20:24
Re: Lunar-Distance correction for OblatenessSean C7 Apr 2018, 01:00
Re: Lunar-Distance correction for OblatenessFrank Reed7 Apr 2018, 02:10
Re: Second hand sextant adviceBruce Cutting7 Apr 2018, 21:37
Re: Second hand sextant adviceBill Morris7 Apr 2018, 21:50
Re: Second hand sextant adviceDavid C7 Apr 2018, 22:31
Correction for diameter of the earthC Solo7 Apr 2018, 23:56
Re: Second hand sextant adviceJackson McDonald8 Apr 2018, 01:26
Re: Correction for diameter of the earthSean C8 Apr 2018, 04:43
Re: Second hand sextant adviceAlan S8 Apr 2018, 04:47
Re: Second hand sextant adviceMichael Bradley8 Apr 2018, 09:18
New York Times article on Viking Navigation and their use of "Sunstones"Ed Popko8 Apr 2018, 10:34
Photo of horizonRobert VanderPol II8 Apr 2018, 15:27
Article: Inside the Worst U.S. Maritime Disaster in DecadesJackson McDonald9 Apr 2018, 01:54
Re: New York Times article on Viking Navigation and their use of "Sunstones"Erland Andersen9 Apr 2018, 02:15
Henning Umland's spreadsheets.Bill Lionheart9 Apr 2018, 02:20
Re: Photo of horizonSean C9 Apr 2018, 02:23
Re: New York Times article on Viking Navigation and their use of "Sunstones"Wolfgang Köberer9 Apr 2018, 07:12
Re: Article: Inside the Worst U.S. Maritime Disaster in DecadesEd Popko9 Apr 2018, 11:35
Re: Photo of horizonRobert VanderPol II9 Apr 2018, 13:46
Re: New York Times article on Viking Navigation and their use of "Sunstones"Tony Oz9 Apr 2018, 14:05
Re: New York Times article on Viking Navigation and their use of "Sunstones"Bob Goethe9 Apr 2018, 15:44
Wikipedia Article on "Stellar Triangulation"Fred Hebard9 Apr 2018, 15:54
Lunars: Altitude Accuracy (revisited)Ed Popko9 Apr 2018, 16:37
Re: Second hand sextant adviceBob Goethe9 Apr 2018, 16:58
Re: Wikipedia Article on "Stellar Triangulation"Frank Reed9 Apr 2018, 17:50
Re: Henning Umland's spreadsheets.Bill Lionheart10 Apr 2018, 14:06
Lewis and Clark LunarsGreg Rudzinski10 Apr 2018, 15:48
Re: Henning Umland's spreadsheets.Paul Hirose10 Apr 2018, 19:56
Re: Henning Umland's spreadsheets.Brad Morris10 Apr 2018, 20:13
SNO-T for sale, £300Robert VanderPol II11 Apr 2018, 12:19
Re: Henning Umland's spreadsheets.Frank Reed11 Apr 2018, 16:39
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayFrank Reed11 Apr 2018, 17:00
Re: Sail the tall ship OHP, April 25-May 10Frank Reed11 Apr 2018, 17:08
Re: Henning Umland's javascript web appBill Lionheart11 Apr 2018, 17:53
Sumner Line SR by Martelli TableGreg Rudzinski11 Apr 2018, 18:03
Re: Wikipedia Article on "Stellar Triangulation"Fred Hebard11 Apr 2018, 19:21
New Edition of BowditchRommel John Miller11 Apr 2018, 20:02
Re: Janet Taylor's "Principles of Navigation Simplified" (1837) on ebayDon Seltzer11 Apr 2018, 21:53
Re: New Edition of BowditchKen Gebhart11 Apr 2018, 22:00
Video tour of our MoonEd Popko12 Apr 2018, 15:12
Re: Video tour of our MoonSean C13 Apr 2018, 02:13
More accurate version of Pub 249 Vol 1 - is it needed?Rafal O.13 Apr 2018, 11:17
The marquis de Chabert & the lunar distanceDucruy Jacques13 Apr 2018, 16:08
Re: More accurate version of Pub 249 Vol 1 - is it needed?Gary LaPook13 Apr 2018, 16:22
Re: More accurate version of Pub 249 Vol 1 - is it needed?David Pike13 Apr 2018, 20:07
Re: More accurate version of Pub 249 Vol 1 - is it needed?Gary LaPook14 Apr 2018, 05:42
Ghost Ring vs. Sight TubeGreg Rudzinski14 Apr 2018, 19:49
Mirages and refraction.Tony Oz14 Apr 2018, 22:34
Re: SNO-T for sale, £300Örjan Sandström15 Apr 2018, 12:02
Celesticomp V instructionsBrian Lloyd15 Apr 2018, 15:05
Sextant as hand luggage on a planeBill Lionheart15 Apr 2018, 16:20
Re: Celesticomp V instructionsJohn Carbone15 Apr 2018, 18:21
Re: Sextant as hand luggage on a planeAlejandro Purgue15 Apr 2018, 18:28
Re: Sextant as hand luggage on a planeRobert Eno15 Apr 2018, 19:06
Re: Sextant as hand luggage on a planeJames F Campbell15 Apr 2018, 19:16
Re: Sextant as hand luggage on a planeRobin Stuart15 Apr 2018, 19:42
Re: Sextant as hand luggage on a planeJames F Campbell15 Apr 2018, 20:37
Re: SNO-T for sale, £300Robert VanderPol II15 Apr 2018, 21:10
Re: Sextant as hand luggage on a planeAlan S15 Apr 2018, 22:37
Re: Celesticomp V instructionsStan K15 Apr 2018, 23:43
Re: Sextant as hand luggage on a planeKen Gebhart16 Apr 2018, 17:26
Lunars: this weekend at Mystic SeaportFrank Reed16 Apr 2018, 18:28
Re: Lunars: this weekend at Mystic SeaportFrank Reed16 Apr 2018, 18:40
Re: WWII bubble sextants and radiumGary LaPook17 Apr 2018, 00:16
Re: Lunars: this weekend at Mystic SeaportEd Popko17 Apr 2018, 00:59
Re: Sextant as hand luggage on a planeAlan S17 Apr 2018, 04:02
Re: Lunars: this weekend at Mystic SeaportJeremy C17 Apr 2018, 12:26
Micrometer vernierFrank Reed17 Apr 2018, 17:03
Re: Micrometer vernierBob Goethe17 Apr 2018, 17:40
Re: Micrometer vernierDavid Fleming17 Apr 2018, 17:46
Re: Micrometer vernierFrank Reed17 Apr 2018, 18:00
Re: Micrometer vernierWilliam Edward Henry17 Apr 2018, 22:47
Re: Micrometer vernierMichael Bradley17 Apr 2018, 22:48
Re: Micrometer vernierBill Morris18 Apr 2018, 00:04
Re: Micrometer vernierDavid Pike18 Apr 2018, 11:35
Re: Micrometer vernierTony Oz18 Apr 2018, 12:55
Re: Lunars: this weekend at Mystic SeaportRobin Stuart18 Apr 2018, 13:21
Re: Lunars: this weekend at Mystic SeaportGreg Rudzinski18 Apr 2018, 16:59
Re: Lunars: this weekend at Mystic SeaportEd Popko18 Apr 2018, 17:00
Re: Micrometer vernierPosth P18 Apr 2018, 17:08
Re: Micrometer vernierPeter Monta18 Apr 2018, 22:07
Re: Micrometer vernierAlexandre Eremenko18 Apr 2018, 22:42
Re: Lunars: this weekend at Mystic SeaportGreg Rudzinski19 Apr 2018, 04:00
Finding the EnduranceDavid C19 Apr 2018, 07:02
Re: Micrometer vernierTony Oz19 Apr 2018, 08:50
Re: Lunars: this weekend at Mystic SeaportEd Popko19 Apr 2018, 10:15
Re: Lunars: this weekend at Mystic SeaportGreg Rudzinski19 Apr 2018, 15:33
Moon-rise/set with Air Almanac: how to?Tony Oz19 Apr 2018, 17:44
HO-211 Hulbert Hinkel Jr.Robert VanderPol II20 Apr 2018, 03:42
Re: Moon-rise/set with Air Almanac: how to?Robert Bernecky20 Apr 2018, 14:13
Lumpy lunar edgeEd Popko20 Apr 2018, 18:08
Re: Viking Navigation and "Sunstones"Tony Oz22 Apr 2018, 07:33
Sight reduction program for iPhonesChris Caswell22 Apr 2018, 13:13
Celestial Tools V5.6.9Stan K22 Apr 2018, 18:08
Re: Viking Navigation and "Sunstones"Geoffrey Kolbe23 Apr 2018, 05:14
Longest Straight Line Paths on Water or Land on the EarthRobert H. van Gent23 Apr 2018, 18:51
Re: Longest Straight Line Paths on Water or Land on the EarthAlexandre Eremenko23 Apr 2018, 20:21
Compassipedia online compass museumPaul Hirose23 Apr 2018, 21:41
Re: Longest Straight Line Paths on Water or Land on the EarthJohn D. Howard23 Apr 2018, 23:43
Re: Longest Straight Line Paths on Water or Land on the EarthRobert VanderPol II24 Apr 2018, 04:24
Re: Longest Straight Line Paths on Water or Land on the EarthPeter Hakel24 Apr 2018, 12:31
Autonomous ships are coming.Gary LaPook24 Apr 2018, 17:20
Re: Autonomous ships are coming.Lu Abel24 Apr 2018, 18:52
Re: Autonomous ships are coming.Jeremy C25 Apr 2018, 06:23
Norie 1819, Bowditch 1837, and a fine old Tamaya sextant on ebayFrank Reed28 Apr 2018, 01:49
Re: Norie 1819, Bowditch 1837, and a fine old Tamaya sextant on ebayDavid C28 Apr 2018, 03:48
Re: Norie 1819, Bowditch 1837, and a fine old Tamaya sextant on ebayFrank Reed28 Apr 2018, 04:19
Celestial Navigation is so simpleDon Seltzer28 Apr 2018, 15:47
Re: Celestial Navigation is so simpleGary LaPook28 Apr 2018, 16:39
Re: Celestial Navigation is so simpleGreg Rudzinski28 Apr 2018, 17:35
Re: Celestial Navigation is so simpleAlan S28 Apr 2018, 18:23
Navigation ModulesAlan S28 Apr 2018, 20:41
Re: Navigation ModulesAntoine Couëtte29 Apr 2018, 06:34
Re: Navigation ModulesAntoine Couëtte29 Apr 2018, 10:24
Re: Navigation ModulesStan K29 Apr 2018, 15:12
Re: Navigation ModulesRobin Stuart29 Apr 2018, 17:47
John Karl's Celestial Navigation in the GPS AgeAonghus O Concheanainn29 Apr 2018, 21:34
Re: John Karl's Celestial Navigation in the GPS AgeRobert VanderPol II29 Apr 2018, 22:02
Re: John Karl's Celestial Navigation in the GPS AgeStan K29 Apr 2018, 23:00
Re: Navigation ModulesAndrew Nikitin30 Apr 2018, 12:43
Re: John Karl's Celestial Navigation in the GPS AgeRobert Bernecky30 Apr 2018, 13:48
Re: Navigation ModulesRobin Stuart30 Apr 2018, 19:21
Mark 7 Knee-Mounted Plotting BoardMiles B. Anderson30 Apr 2018, 20:43
Re: John Karl's Celestial Navigation in the GPS AgeAonghus O Concheanainn30 Apr 2018, 22:43
Re: John Karl's Celestial Navigation in the GPS AgeSean C30 Apr 2018, 23:45

Index includes 190 messages.

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