VESSEL TRAFFIC MANAGEMENT (VTM) - U.S. Coast Guard ...

The boundaries are set forth in the Code of Federal Regulations and appear in the Coast Pilot as well as on officially published nautical charts. 33CFRPart 80. DIFFERENTIAL GPS (DGPS) The maritime DGPS system, operated by the Coast Guard, enhances the positional accuracy achievable using GPS by broadcasting pseudo-range corrections using ... ................
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