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  2. Department of Defense master clock - Wikipedia

    en.wikipedia.org/wiki/Department_of_Defense...

    The Department of Defense master clock is the atomic master clock to which time and frequency measurements for the United States Department of Defense are referenced. Located in Washington D.C., the U.S. Naval Observatory master clock is designated as the "DOD Master Clock".

  3. United States Naval Observatory - Wikipedia

    en.wikipedia.org/wiki/United_States_Naval...

    It is the combined ‘vote’ of the ensemble that constitutes the otherwise-fictitious “Master Clock”. The time-scale computations on 7 June 2007 weighted 70 of the clocks into the standard. [33] US Naval Observatory outside display of the master clock time. The U.S. Naval Observatory provides public time service via 26 NTP [33] servers on ...

  4. Time synchronization in North America - Wikipedia

    en.wikipedia.org/wiki/Time_synchronization_in...

    NIST Automated Computer Time Service (ACTS) [27] +1-303-494-4774 +1-808-335-4721; Windows computer with dialup modem. ntpd with NIST/USNO/PTB Modem Time Services driver; ClockWatch Pro for Windows [22] USNO Master Clock modem time [28] +1-202-762-1594 Computer with Bell 212A or CCITT V.22 compatible modem US Naval Observatory time service UTC(USNO)

  5. Master clock - Wikipedia

    en.wikipedia.org/wiki/Master_clock

    Master clock (at left) driving several slave clocks in an enthusiast's garage. The third one from the left at the top is a radio-controlled clock for reference. The master atomic clock ensemble at the U.S. Naval Observatory in Washington, D.C., which provides the time standard for the U.S. Department of Defense. [1]

  6. List of atomic clocks - Wikipedia

    en.wikipedia.org/wiki/List_of_atomic_clocks

    USNO Alternate Master Clock ... Colorado United States [11] WWV WWVB; Larimer ... Department of Defense master clock: United States Naval Observatory; Washington ...

  7. Now eyeing a longer haul, the US reshuffles its ... - AOL

    www.aol.com/news/now-eyeing-longer-haul-us...

    The U.S. Navy is reshuffling its warship deployment in the Middle East to maintain dominance in the region – now eyeing the longer haul as concerns mount that Israel’s war on Hamas in Gaza ...

  8. Marine chronometer - Wikipedia

    en.wikipedia.org/wiki/Marine_chronometer

    A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation.It is used to determine longitude by comparing Greenwich Mean Time (GMT), and the time at the current location found from observations of celestial bodies.

  9. Nautical time - Wikipedia

    en.wikipedia.org/wiki/Nautical_time

    Time on a ship's clocks and in a ship's log had to be stated along with a "zone description", which was the number of hours to be added to zone time to obtain GMT, hence zero in the Greenwich time zone, with negative numbers from −1 to −12 for time zones to the east and positive numbers from +1 to +12 to the west (hours, minutes, and ...