NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Pub.229 GC-Calculation distance and course.
From: Guus Dekker
Date: 2009 Dec 2, 12:16 -0800
From: Guus Dekker
Date: 2009 Dec 2, 12:16 -0800
John Karl, What Hewitt reply is what mean. O yes, I see you find out it yourself. Quote: "All this is pretty darn academic compared to actual practice at sea -- at least in my experience." You are COMPLETELY RIGHT. BUT ... My Navigation armchairs are already spoiled for X times. Please invite me to do THE practice at SEA ! Guus. On 2 dec, 04:37, John Karlwrote: > Guus, > > I don't understand the 0.2* that you're talking about. The Z > interpolation is for the dec between 29* and 30*, the desired Z being > for dec = 29* 52'. So the Z interpolation calculation is 52'/60' X > 0.9* = 0.8*, giving Z = 66.9* - 0.8* - 66.1* as in the book. > > Make sense? > > JK -- NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com