NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Precomputed LOP for sailboat landfall
From: George Huxtable
Date: 2009 Feb 22, 23:16 -0000
From: George Huxtable
Date: 2009 Feb 22, 23:16 -0000
NOB158 (wish he gave us a name to call him by) wrote- "Would somebody please help me with better understanding of method of landfall by using precomputed LOP. I was reading about using this method for sailboat landfall in John Karl�s book "Celestial Navigation in the GPS age" (published by Paradise Cay, 2007). I would like to discuss the Figure 10.5b (page 140) where I think the mistake was made. Specifically, it is not clear how Hc of 75 and 81 degrees for LOP 2300 UT resulted in 6 nm intersept. Can somebody clarify it?" I think he has found an error here, in which degrees have got confused with minutes. I understand that John Karl is in the throes of a revision, so I will alert him to this one. George. contact George Huxtable, at george@hux.me.uk or at +44 1865 820222 (from UK, 01865 820222) or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---