[ntp:questions] how to have offset < 1ms

John Hasler jhasler at newsguy.com
Wed Apr 14 23:31:21 UTC 2010

Richard B. Gilbert writes:
> One possible solution is using radio controlled clocks.  I have a
> wristwatch that uses a radio signal to correct itself.  I also have a
> wall clock that does the same.  Both work very well.

They won't work very well inside a steel ship or far out to sea.  They
use VLF (60kHz/77kHz) signals that only propagate a thousand miles or
so and not at all through steel.

In any case it is clear that the ACEB box can provide the performance he
needs if he can only communicate with it.  He has a networking problem,
not a timekeeping problem.
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA

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