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Our News and Notices

GPS Roll Over

RC (Cruising) - 02 Mar 19 Cruising

Alert issued for a second GPS Roll Over due to limitations in the 10 digit binary number store.

The United Kingdom Maritime Coastguard Agency (MCA) and the United States Homeland Security have issued alerts for operators using Global Positioning System (GPS) for both position and Universal Coordinated Time (UTC). Both advise that the GPS week number will be rolling over for a second time on 6 April 2019 due to the limitations of the 10-bit binary number, in which the week number is stored. The most vulnerable/exposed units are ones that are more than 10 years and or units that have not been regularly updated. Source: The Standard Club

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