COLREGS Demarcation Lines

*** Special Notice Regarding LORAN Closure: *** In accordance with the DHS Appropriations Act, the U.S. Coast Guard will terminate the transmission of all U.S. LORAN-C signals effective 2000Z 08 Feb 2010. At that time, the U.S. LORAN-C signal will be unusable and permanently discontinued. This termination does not affect U.S. participation in the Russian American or Canadian LORAN-C chains. U.S. participation in these chains will continue temporarily in accordance with international agreements. You may read more and download pertinent documents via our LORAN-C page.

Navigation Rules

Primary Mission Areas:

Maritime Information:

33 CFR 80
COLREGS DEMARCATION LINES

General

§ 80.01 General basis and purpose of demarcation lines.

Atlantic Coast

First District - ME, NH, VT, MA, RI, CT, the Atlantic Coast of NY, and NJ north of Shrewsbury River.

80.105 Calais, ME to Cape Small, ME.
80.110 Casco Bay, ME.
80.115 Portland Head, ME to Cape Ann, MA.
80.120 Cape Ann, MA to Marblehead Neck, MA.
80.125 Marblehead Neck, MA to Nahant, MA.
80.130 Boston Harbor entrance.
80.135 Hull, MA to Race Point, MA.
80.145 Race Point, MA to Watch Hill, RI.
80.150 Block Island, RI.
80.155 Watch Hill, RI to Montauk Point, NY.
80.160 Montauk Point, NY to Atlantic Beach, NY.
80.165 New York Harbor.
80.170 Sandy Hook, NJ to Tom's River, NJ.

Fifth District - NJ just south of Shrewsbury River, DE, MD, VA, DC, NC, and southeast PA.

80.501 Tom's River, NJ to Cape May, NJ.
80.503 Delaware Bay.
80.505 Cape Henlopen, DL to Cape Charles, VA.
80.510 Chesapeake Bay Entrance, VA.
80.515 Cape Henry, VA to Cape Hatteras, NC.
80.520 Cape Hatteras, NC to Cape Lookout, NC.
80.525 Cape Lookout, NC to Cape Fear, NC.
80.530 Cape Fear, NC to New River Inlet, NC.

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Seventh District - SC, the Atlantic coast of GA, FL east of 83^o50', PR and the Virgin Islands.

80.703 Little River Inlet, SC to Cape Romain, SC.
80.707 Cape Romain, SC to Sullivans Island, SC.
80.710 Charleston Harbor, SC.
80.712 Morris Island, SC to Hilton Head Island, SC.
80.715 Savannah River.
80.717 Tybee Island, GA to St. Simons Island, GA.
80.720 St. Simons Island, GA to Amelia Island, FL.
80.723 Amelia Island, FL to Cape Canaveral, FL.
80.727 Cape Canaveral, FL to Miami Beach, FL.
80.730 Miami Harbor, FL.
80.735 Miami, FL to Long Key, FL.

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Puerto Rico and Virgin Islands

Seventh District - SC, the Atlantic coast of GA, FL east of 83^o50', PR and the Virgin Islands.

80.738 Puerto Rico and Virgin Islands.

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Gulf Coast

Seventh District - SC, the Atlantic coast of GA, FL east of 83^o50', PR and the Virgin Islands.

80.740 Long Key, FL to Cape Sable, FL.
80.745 Cape Sable, FL to Cape Romano, FL.
80.748 Cape Romano, FL to Sanibel Island, FL.
80.750 Sanibel Island, FL to St. Petersburg, FL.
80.753 St. Petersburg, FL to Anclote, FL.
80.755 Anclote, FL to the Suncoast Keys, FL.
80.757 Suncoast Keys, FL to Horseshoe Point, FL.
80.760 Horseshoe Point, FL to Rock Island, FL.

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Eighth District - FL west of 83^o50', AL, MS, LA, TX, NM, OK, AR, TN, WV, KY, MO, KS, CO, IA, NE, WY, SD, ND, and southern OH, IN, IL, WI, PA, and MN.

80.805 Rock Island, FL to Cape San Blas, FL.
80.810 Cape San Blas, FL to Perdido Bay, FL.
80.815 Mobile Bay, AL to the Chandeleur Islands, LA.
80.825 Mississippi Passes, LA.
80.830 Mississippi Passes, LA to Point Au Fer, LA.
80.835 Point Au Fer, LA to Calcasieu Pass, LA.
80.840 Sabine Pass, TX to Galveston, TX.
80.845 Galveston, TX to Freeport, TX.
80.850 Brazos River, TX to the Rio Grande, TX.