NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Advancing LOPs for precision fixes
From: Peter Fogg
Date: 2010 Feb 24, 13:39 +1100
From: Peter Fogg
Date: 2010 Feb 24, 13:39 +1100
Gary LaPook wrote:
Since I had time on my hands I sat down with my calculator and computed a "Motion of the Observer" correction table for the speed range of 1 to 12 knots which I have attached.
Thanks for this, Gary. My electronic nav calculator includes correction for change in observer location but now I have a manual method, and am grateful to you for it. I agree that for best accuracy this effect should be accounted for, although in the case of a small sailing boat with an average speed of about 3 knots the accuracy difference under average conditions would seem to be minimal, as errors due to observations being made from this unstable platform close to the sea surface tend to swamp the much smaller error effect due to change in the boat's location.
