NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: DR plotting techniques
From: Rodney Myrvaagnes
Date: 2003 Oct 17, 13:18 -0500
From: Rodney Myrvaagnes
Date: 2003 Oct 17, 13:18 -0500
George, In most respects, including casualness, your paractice is similar to mine. However, the following brought me up short. On Fri, 17 Oct 2003 17:42:28 +0100, George Huxtable wrote: > >This is how GPS is used on my boat. I don't bother with waypoints, or with >tracks between them, because in a cross tideway such straight ground-tracks >are often highly inefficient. Steering is always done from the ship's >compass, not heeding any off-track error indication. At irregular intervals I can't see how an uptide or downtide arc could be more efficient than a continuously-corrected rhumbline. Could you explain which is more efficient, and why? NB to new list members: I have been wrong in the past challenging George. Thanks Rodney Myrvaagnes J36 Opinionated old geezer Eagles may soar, but weasels don't get sucked into jet engines.
