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Subject: Re: log lines
From: Dan Hogan (dhhogan1@XXX.XXX)
Date: Wed Jun 11 2003 - 12:57:31 EDT
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}
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