This handbook (which supersedes Commandant Instruction 16772.2D, Navigation Rules: International-Inland*) is a compendium, produced by the U.S. Coast Guard Navigation Standards Branch, U.S. Coast Guard Headquarters, Washington, DC, of the: International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS); Inland Navigation Rules (33 CFR 83); their respective technical annexes (33 CFR 84-90); COLREGS Demarcation Lines (33 CFR 80); Vessel Bridge-to-Bridge Radiotelephone Regulations, (33 CFR 26); Vessel Traffic Management Regulations (33 CFR 161); and, various other pertinent provisions of the U.S. Code and Code of Federal Regulations regarding compliance and penalties associated with the Navigation Rules.