NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2013 May 24, 13:20 -0700
And as as an example ....
RE: http://fer3.com/arc/m2.aspx/Have-mechanical-clocks-time-passed-OfPeripheral-Interest-GeoffreyKolbe-may-2013-g24143
Hello to all and to you in particular Geoffrey,
During in the past 35+ years I have been using the same Omega SpeedMaster (mechanical) watch. When I was doing CelNav on a very regular basis in the French Navy in the mid-seventies, my watch daily drift could stay between 3 to 5 seconds for weeks in a row, which would be "horrific" nowadays for a quartz watch, but was a quite respectable performance for a 100% mechanical watch then.
The Navy Timekeepers drift requirements then were to stay below 5 seconds a day, otherwise failing Timekeepers were to be sent for overhaul. We generally had 3 Timekeepers on board with at least one of them always showing a drift between 5 and 10 seconds per week.
They now have quartz Timekeepers.
Best Regards to all
Kermit
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