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Post			Author	Forum	Replies	Views	Posted [asc]
		Thread: New (to me) Ebbco Post: RE: New (to me) Ebbco The EBBCO sextant was made by (or for) the East Berks Boat Company, a lifeboat manufacturer in Berkshire, UK. The sextant was intended for emergency use in the lifeboat and came with a set of very bas...	jeremyparker	General Topics Here	3	4,901	02-01-2021, 01:56 AM
		Thread: The North Pole no longer wanders - it runs Post: RE: The North Pole no longer wanders - it runs Rumata Wrote: (01-30-2019, 07:18 AM) -- Gentlemen,  below is the translation from German into English of some interesting fact. Hope, you will find it  useful. The translation of the article in the f...	jeremyparker	The Sight Reduction process	7	10,706	08-15-2019, 06:35 AM
		Thread: Assumed Position: adjustment necessary when using calculator? Post: RE: Assumed Position: adjustment necessary when u... Stearmandriver Wrote: (05-08-2019, 05:59 AM) -- Hello all!  Great forum here. I've been browsing and learning for a week; as esoteric as it might be these days, it's nice to have a dedicated place...	jeremyparker	The Sight Reduction process	4	6,158	08-15-2019, 06:03 AM
		Thread: v for the sun Post: RE: v for the sun albyreto Wrote: (03-30-2017, 07:02 PM) -- hi, why there's not v correction for the sun GHA? In italy the "Nautical Almanac" have the v correction for the sun. Maybe its not important but sometimes...	jeremyparker	The Sight Reduction process	6	9,633	04-03-2017, 09:58 AM
		Thread: Need 2017 Altitude Correction Tables Post: RE: Need 2017 Altitude Correction Tables P.Rutherford Wrote: (03-22-2017, 11:40 PM) -- Will someone please upload a copy of the 2017 Altitude Correction Tables? I've been using the an old version of them- mostly for the Sun.  There isn't...	jeremyparker	The Sight Reduction process	2	5,329	04-03-2017, 09:05 AM
		Thread: Co-Latitude Post: RE: Co-Latitude c_davidson Wrote: (03-24-2016, 01:21 AM) -- Would someone please explain to me what Co-Latitude is? C. D. -- CoLat is simply the complementary angle of the Latitude, (as CoDec is the complement ...	jeremyparker	General Topics Here	2	9,362	03-27-2016, 06:03 AM
		Thread: Arrogant mathematicians Post: RE: Arrogant mathematicians c_davidson Wrote: (02-29-2016, 03:01 PM) -- Celestial navigation is difficult for a multitude of reasons but I wish to focus upon one particular- the math portion. Learning celnav was very difficu...	jeremyparker	General Topics Here	3	8,263	03-09-2016, 11:28 PM
		Thread: Venus magnitude -4.0 Post: RE: Venus magnitud -4.0 stargazer Wrote: (02-29-2016, 02:41 PM) -- CelNav57 Wrote: (02-29-2016, 12:47 PM) -- jeremyparker Wrote: (02-29-2016, 12:05 PM) -- PS - apologies for the asterisk - I'm not sure where to find a deg...	jeremyparker	The Sight Reduction process	11	21,307	03-06-2016, 08:22 AM
		Thread: Venus magnitude -4.0 Post: RE: Venus magnitud -4.0 Fred you're correct, 'v' stands for the variation in the rate of change of GHA between the mean rate of 15* per hour, as tabulated in Increments and Corrections, and the actual rate of change for that...	jeremyparker	The Sight Reduction process	11	21,307	02-29-2016, 12:05 PM
		Thread: Does anyone really shoot the Moon? Post: RE: Does anyone really shoot the Moon? Irradiation of the Moon: Irradiation is the phenomenon whereby there is an apparent enlargement of the edges of a strongly illuminated object when viewed against a dark background. The effect would m...	jeremyparker	The Sight Reduction process	8	15,904	02-29-2016, 04:51 AM
		Thread: Does anyone really shoot the Moon? Post: RE: Does anyone really shoot the Moon? Moon shots: The moon is tricky to shoot and to reduce correctly - why? It's big and bright and easy to identify, but it jiggers about, so hour angle and declination are more complicated to calculate, ...	jeremyparker	The Sight Reduction process	8	15,904	02-26-2016, 11:56 PM

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