NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2015 Sep 9, 00:20 -0400
Hello Frank
Not saying this is what was experienced, but here is one scenario.
Day One: establish position
Day Two: The sights put them well ahead (behind) the expected DR position, leading them to think the time had jumped. The course made good was more (less) than they thought for the day.
Day Three: The sights put them back on the expected two day DR position, but the course made good is less (more) than what they thought for the day.
In other words, after two days, they were were they thought they should be vs the DR. But each day had opposing displacements, leading to the theory that the time on day two had jumped.
I wasn't there. I didn't see it. I don't know if this was the situation. The only thing I can say is that it fits the facts.
Brad
"Both I and the boat's captain (who also was doing some sextant work) felt like we noticed two occasions when the GPS clock jumped ahead by a couple of seconds on a given day, and then fell back to what we expected the following day."
A couple of seconds? Even if that happened, how could you tell?
Frank Reed
