3/22/2019: Special notice to mariners – upcoming GPS week number rollover

The Coast Guard Navigation Center published a special notice to mariners that outlines the details of the GPS Week Number Rollover occuring April 6-7, 2019.

To view the special notice, visit the NAVCEN’s website.

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.

Additional information about GPS and the GPS Week Number Rollover can be found on GPS.gov or in a recent Department of Homeland Security Memorandum.

Civil GPS users are encouraged to report disruptions or anomalies through Navigation Center’s online reporting tool or via phone at 703-313-5900, 24 hours a day.

This blog is not a replacement or substitute for the formal posting of regulations and updates or existing processes for receiving formal feedback of the same. Links provided on this blog will direct the reader to official source documents, such as the Federal Register, Homeport and the Code of Federal Regulations. These documents remain the official source for regulatory information published by the Coast Guard.

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