NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Digital Dead Reckoning Calcs
From: Andrés Ruiz
Date: 2023 Nov 21, 11:31 +0100
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From: Andrés Ruiz
Date: 2023 Nov 21, 11:31 +0100
El mar, 21 nov 2023 a las 3:32, NavList Community (<NavList@fer3.com>) escribió:
Is the Lat used when calculating the change in longitude (dLon = Dist x sin course / cos Lat) the original latitude (Lat0) or the adjusted latitude after adding the change in latitude (Lat = Lat0 + dLat/60)?
Sailing - method of solving the various problems involving course, distance, departure and destination points.
Dead reckoning - the determination without the aid of celestial observations of the position of a ship or aircraft from the record of the courses sailed or flown, the distance made, and the known or estimated drift. Currents and winds affect.
These formulae come from middle-latitude sailing. An approach.
See the attached pdf.
best regards.
By the way, Frank, in the emails that arrive directly, the sender does not appear, and if they are not signed, you cannot know who sent them.
