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Coast Guard Navigation Center: Special Notice to All Mariners Who Use GPS Equipment

The Coast Guard Navigation Center has published a special notice to mariners that use GPS Equipment. The special notice outlines the details of the GPS Week Number Rollover that will occur on 6-7 April.

Users can find the special notice on NAVCEN’s website: https://navcen.uscg.gov/pdf/lnms/LNM_Special_Notice_2019_Use_GPS_Equipment_Indefinite.pdf

To best prepare for the rollover event, users of GPS equipment who are concerned should update their firmware, or contact their equipment manufacturer to ensure their equipment is ready for this event.

Find additional information about GPS and the GPS Week Number Rollover here:

• GPS.gov
• Department of Homeland Security Memorandum for U.S. Owners and Operators Using GPS to Obtain UTC Time

Civil GPS users are encouraged to report disruptions or anomalies to the U.S. Coast Guard Navigation Center or via phone at 703-313-5900, 24 hours a day.

Rick Hamilton
CGSIC Executive Secretariat
GPS Information Analysis Team Lead
U.S. Coast Guard Navigation Center
703-313-5930