NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Bob Goethe
Date: 2015 Sep 8, 20:48 -0700
I had an odd experience last summer. I was on a boat for 19 days, doing celestial for many of them. I had rated my Casio Wave-Ceptor watch before leaving home, and so knew what its typical rate of gain/loss was when out of range of the NIST transmissions.
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.
I was not listening to WWV on the shortwave, so I never got a golden-standard for my time observations. All I had was a vague sense that the time on the GPS receiver was maybe not reliable. Has anybody else noted something like this...or did I simply make a couple of spurious observations?
Bob
