NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: How Many Chronometers?
From: Greg Rudzinski
Date: 2009 May 6, 13:38 -0700
From: Greg Rudzinski
Date: 2009 May 6, 13:38 -0700
Jim,
Naturally a log of rates should be kept for each chronometer.
Once chronometer rates are known then three chronometers which were
synchronized for the purpose of comparison should provide answers to
two unknowns. 1. that each chronometer is functioning consistently
with respect to each other and 2. that the original date of
synchronization could be determined without prior knowledge. The
navigator should then be able to arrive at the correct GMT/UT knowing
only that the chronometers were synchronized on the same day.
On May 6, 12:31�pm, James N Wilson wrote:
> How about a log which keeps error and rate. John Harrison's chronometer
> had to be accurate for three years at sea for him to win the prize. And
> there were zero sources of time ticks then.
>
> Jim Wilson
> ____________________________________________________________
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