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  • National Institute of Standards and Technology (NIST) radio stations which broadcast a time and frequency service commonly known to mariners as the "Time Tick", used as an aid in celestial navigation. Included in these are hourly voice broadcasts of current warnings for the Atlantic, Pacific and Gulf of Mexico provided by the National Weather Service.

    NOAA National Weather Service - Cite This Source - This Definition
  • Browse Related Terms: GMDSS, NAVTEX, PRVD, SafetyNET, SITOR, WWV, WWVH