Re:Precision Clock Mk IV
by signal-intel on Saturday May 31, 2025 @01:51PM
(#44145861)
No GPS in SCIFs. Agree ntp would be great. Also I’d prefer a way to manually switch between a fixed set of time zone, or even just showing UTC always as an option.
[ Parent
| on HN ]
How do SCIFs do time? Do they use optoisolated network connections and then do time sync over that? (SIPRnet, is it?)
Re:Precision Clock Mk IV
by signal-intel on Saturday May 31, 2025 @10:03PM
(#44148170)
The US Navy maintains NTP servers on a variety of networks, the public internet and SIPR included.
https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-N...
Re:Precision Clock Mk IV
by offmycloud on Sunday June 01, 2025 @02:47AM
(#44149077)
If you have a special project need, you might be able to get one-way IRIG time signal on fiber with guard boxes at both ends. There's really no technical reason why you couldn't do analog GPS baseband over fiber, but you do need approved equipment at both ends for policy reasons. (certified for no backflow)