John Hasler wrote:
Richard B. Gilbert writes:
With a closed network the options are limited. With a place to site a
GPS antenna, you can install a GPS clock that will be accurate to
within +/- 50 nanoseconds.
It occurs to me that the sort of fancy GPS that an oceanographic ship is
sure to have on the bridge may already be capable of providing time
service.
The possibility is certainly there. I suspect that a great deal depends
on how the GPS navigation system is designed. It could, in principle,
output any or all of latitude, longitude, elevation, and time. On a
ship the elevation will probably not be of great interest and will
probably be omitted. The time is almost certainly displayed. Whether
or not there is provision for distributing time to remote locations;
e.g. passenger's cabins, is up to the designers and he who pays the bill!
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