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US Coast Guard Alert 2-10, issued 4/13/2010:
DANGERS ASSOCIATED WITH AUTOMATIC CHANNEL SWITCHING ON DIGITAL SELECTIVE CALLING (DSC) EQUIPPED VHF MARINE RADIOS

US Coast Guard Alert issued 1/7/2010:
COAST GUARD ANNOUNCES PUBLICATION OF RECORD OF DECISION ON LONG RANGE AIDS TO NAVIGATION (LORAN-C) PROGRAM