NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2013 May 20, 15:33 -0700
Frank, you wrote:
"I would imagine you were moving very slowly, right? Was your helmsman watching a course made good? Or was it the course to a waypoint? If you're moving very slowly, the small random errors in the GPS position from one fix to the next can translate into noticeable changes in course even if you know your actual course is nearly straight."
I'm not sure wether the helmsman was steering to the waypoint or monitoring the course made good. We were traveling at dead slow which was about 2 kts. so this would set up that random walk around motion you described. It was very hard for me to get the helmsman to trust his magnetic compass :( He was so sure the fancy electronics presented the truth. Hopefully I made a believer out of him regarding radar usefulness and reliability because when the fog lifted we were anchored exactly to a boat length of where we were suppose to be.
Greg Rudzinski
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