NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: log lines
From: Dan Hogan
Date: 2003 Jun 11, 09:57 -0700
From: Dan Hogan
Date: 2003 Jun 11, 09:57 -0700
Since, the biggest thing I ever sailed was 32 feet. I do my navigation with an error circle of at least the distance to the horizon. There is no way that I know of that you are going to get precision on a small boat. So I steer upwind and up current and maintain a 360 degree lookout. On 10 Jun 2003 at 23:26, Trevor J. Kenchington wrote: > Judging instantaneous speed is all very well (whether by visual > observation, Doppler log or anything in between) but how does that help > determine distance off from distance run? Look closely at the methods of > pre-electronic chartwork, as presented in countless textbooks, and you > will see (I do anyway) techniques built around an assumption that the > navigator knows distances run, not speeds. [Snip}
