Broadcasts to end



WASHINGTON, D.C. — The Coast Guard is set to discontinue broadcasts from its remaining 38 differential GPS (DGPS) sites over the next three years, completing system reductions that began in 2016, according to a press release.

The staged reduction of the remaining Coast Guard DGPS broadcast sites will begin in 2018 and end with the last broadcast of GPS corrections over medium frequency in 2020.

“The Coast Guard no longer has a mission requirement for DGPS,” said Lt. Cmdr. Michael Patterson, chief of the Aids to Navigation and Positioning, Navigation and Timing Division. “GPS provides sufficient positional accuracy to meet navigation requirements for harbor approaches and to position Federal Aids to Navigation.”

Patterson said other commercial and government GPS augmentation systems are available for GPS users. The observed accuracy of unaugmented GPS increasingly exceeds the 10-meter accuracy requirements for harbor navigation and harbor approaches.

The Coast Guard will release the specific termination dates for each broadcast site via local notices to mariners.

For more information on the DGPS discontinuance schedule, view the Federal Register Notice.

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