33 Navigation and Navigable Waters 1 2009-07-01 2009-07-01 false Table Of Contents Navigation and Navigable Waters Part chapter i—Coast Guard, Department of Homeland Security 1 Abbreviations Used in This Chapter:

BMC = Chief Boatswains Mate. CGFR = Coast Guard Federal Register document number. CG = Coast Guard. EM = Electrician's Mate. LS = Lightship. NC = Flag hoist meaning, “I am in distress and require immediate assistance.” NCG = Call letters for any Coast Guard Shore Radio Station. OAN = Aids to Navigation Division. PTP = Training and Procurement. U.S.C.G. = United States Coast Guard.