COLREGS Demarcation Lines

Published by Office for Coastal Management | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2019-05-16T00:00:00.000+00:00

U.S. collision regulation boundaries delineate those waters upon which mariners shall comply with the International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS) and those waters upon which mariners shall comply with the Inland Navigation Rules. The waters inland of these lines are subject to the Inland Navigation Rules Act of 1980. The waters outside these lines are subject to the International Navigation Rules of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGS). The Coast Guard has the legal authority to effect regulatory changes to COLREGS. Records in this database are derived from descriptions published in the Code of Federal Regulations Title 33, Part 80 and are for planning purposes only.

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Complete Metadata

describedByType	application/octet-steam
identifier	gov.noaa.nmfs.inport:56121
issued	2019-05-16T00:00:00.000+00:00
landingPage	https://www.fisheries.noaa.gov/inport/item/56121
language	[]
references	[ "https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/56121.pdf" ]
spatial	166.634428,-14.295391,-178.110405,71.182005

Location