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This is really quite simple.  Use the GPS.  GPS birds have atomic
clocks on them and the only error in the time signal is from the
transmission delay between the sat and your receiver.  A website has
all sorts of network delays as packets get sent to and fro.  Radio
signals on LF and HF have similar transmission delays (it's the basis
of LORAN and DECCA), but again, they are measured in milliseconds, and
not really anything to worry about when setting a sight watch.  Of
course if you really want to go "old school," shoot using a stopwatch
and compare it to a chronometer that has a known error and error rate.

At sea, I use my $30 Timex Ironman.  I do not keep an error rate, but
i do check it against the GPS clock before a sight to ensure that I am
within a second before shooting.  The watch keeps excellent time and
has an error of only a second or two over a month or more and i
certainly don't baby it on deck.

JCA

> Bringing it into the realm of traditional navigation, which time do I use to
> set my hack watch? ;-) �Potentially a quarter mile intercept difference
> under ideal circumstances.

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