---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "chI/subchD/part80"
level: "part"
label: "Part 80"
heading: "Colregs Demarcation Lines"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/33/chI-subchD-part80"
sections_count: 106
---

# Part 80 — Colregs Demarcation Lines

Title 33 C.F.R. — Navigation and Navigable Waters › Chapter I — Coast Guard, Department of Homeland Security › Subchapter D — International Navigation Rules

## Sections

- [§80.01. General basis and purpose of demarcation lines.](/cfr/33/80.01.md)
- [§80.105. Calais, ME to Cape Small, ME.](/cfr/33/80.105.md)
- [§80.110. Casco Bay, ME.](/cfr/33/80.110.md)
- [§80.115. Portland Head, ME to Cape Ann, MA.](/cfr/33/80.115.md)
- [§80.120. Cape Ann, MA to Marblehead Neck, MA.](/cfr/33/80.120.md)
- [§80.125. Marblehead Neck, MA to Nahant, MA.](/cfr/33/80.125.md)
- [§80.130. Boston Harbor entrance.](/cfr/33/80.130.md)
- [§80.135. Hull, MA to Race Point, MA.](/cfr/33/80.135.md)
- [§80.145. Race Point, MA, to Watch Hill, RI.](/cfr/33/80.145.md)
- [§80.150. Block Island, RI.](/cfr/33/80.150.md)
- [§80.155. Watch Hill, RI to Montauk Point, NY.](/cfr/33/80.155.md)
- [§80.160. Montauk Point, NY to Atlantic Beach, NY.](/cfr/33/80.160.md)
- [§80.165. New York Harbor.](/cfr/33/80.165.md)
- [§80.501. Sandy Hook, NJ to Tom's River, NJ.](/cfr/33/80.501.md)
- [§80.502. Tom's River, NJ to Cape May, NJ.](/cfr/33/80.502.md)
- [§80.503. Delaware Bay.](/cfr/33/80.503.md)
- [§80.505. Cape Henlopen, DE to Cape Charles, VA.](/cfr/33/80.505.md)
- [§80.510. Chesapeake Bay Entrance, VA.](/cfr/33/80.510.md)
- [§80.515. Cape Henry, VA to Cape Hatteras, NC.](/cfr/33/80.515.md)
- [§80.520. Cape Hatteras, NC to Cape Lookout, NC.](/cfr/33/80.520.md)
- [§80.525. Cape Lookout, NC to Cape Fear, NC.](/cfr/33/80.525.md)
- [§80.530. Cape Fear, NC to Little River Inlet, NC.](/cfr/33/80.530.md)
- [§80.703. Little River Inlet, SC to Cape Romain, SC.](/cfr/33/80.703.md)
- [§80.707. Cape Romain, SC to Sullivans Island, SC.](/cfr/33/80.707.md)
- [§80.710. Charleston Harbor, SC.](/cfr/33/80.710.md)
- [§80.712. Morris Island, SC to Hilton Head Island, SC.](/cfr/33/80.712.md)
- [§80.715. Savannah River.](/cfr/33/80.715.md)
- [§80.717. Tybee Island, GA to St. Simons Island, GA.](/cfr/33/80.717.md)
- [§80.720. St. Simons Island, GA to Amelia Island, FL.](/cfr/33/80.720.md)
- [§80.723. Amelia Island, FL to Cape Canaveral, FL.](/cfr/33/80.723.md)
- [§80.727. Cape Canaveral, FL to Miami Beach, FL.](/cfr/33/80.727.md)
- [§80.730. Miami Harbor, FL.](/cfr/33/80.730.md)
- [§80.735. Miami, FL to Long Key, FL.](/cfr/33/80.735.md)
- [§80.738. Puerto Rico and Virgin Islands.](/cfr/33/80.738.md)
- [§80.740. Long Key, FL to Cape Sable, FL.](/cfr/33/80.740.md)
- [§80.745. Cape Sable, FL to Cape Romano, FL.](/cfr/33/80.745.md)
- [§80.748. Cape Romano, FL to Sanibel Island, FL.](/cfr/33/80.748.md)
- [§80.750. Sanibel Island, FL to St. Petersburg, FL.](/cfr/33/80.750.md)
- [§80.753. St. Petersburg, FL to the Anclote, FL.](/cfr/33/80.753.md)
- [§80.755. Anclote, FL to the Suncoast Keys, FL.](/cfr/33/80.755.md)
- [§80.757. Suncoast Keys, FL to Horseshoe Point, FL.](/cfr/33/80.757.md)
- [§80.760. Horseshoe Point, FL to Rock Island, FL.](/cfr/33/80.760.md)
- [§80.805. Rock Island, FL to Cape San Blas, FL.](/cfr/33/80.805.md)
- [§80.810. Cape San Blas, FL to Perdido Bay, FL.](/cfr/33/80.810.md)
- [§80.815. Mobile Bay, AL to the Chandeleur Islands, LA.](/cfr/33/80.815.md)
- [§80.825. Mississippi Passes, LA.](/cfr/33/80.825.md)
- [§80.830. Mississippi Passes, LA to Point Au Fer, LA.](/cfr/33/80.830.md)
- [§80.835. Point Au Fer, LA to Calcasieu Pass, LA.](/cfr/33/80.835.md)
- [§80.840. Sabine Pass, TX to Galveston, TX.](/cfr/33/80.840.md)
- [§80.845. Galveston, TX to Freeport, TX.](/cfr/33/80.845.md)
- [§80.850. Brazos River, TX to the Rio Grande, TX.](/cfr/33/80.850.md)
- [§80.1102. Santa Catalina Island, CA.](/cfr/33/80.1102.md)
- [§80.1104. San Diego Harbor, CA.](/cfr/33/80.1104.md)
- [§80.1106. Mission Bay, CA.](/cfr/33/80.1106.md)
- [§80.1108. Oceanside Harbor, CA.](/cfr/33/80.1108.md)
- [§80.1110. Dana Point Harbor, CA.](/cfr/33/80.1110.md)
- [§80.1112. Newport Bay, CA.](/cfr/33/80.1112.md)
- [§80.1114. San Pedro Bay—Anaheim Bay, CA.](/cfr/33/80.1114.md)
- [§80.1116. Redondo Harbor, CA.](/cfr/33/80.1116.md)
- [§80.1118. Marina Del Rey, CA.](/cfr/33/80.1118.md)
- [§80.1120. Port Hueneme, CA.](/cfr/33/80.1120.md)
- [§80.1122. Channel Islands Harbor, CA.](/cfr/33/80.1122.md)
- [§80.1124. Ventura Marina, CA.](/cfr/33/80.1124.md)
- [§80.1126. Santa Barbara Harbor, CA.](/cfr/33/80.1126.md)
- [§80.1130. San Luis Obispo Bay, CA.](/cfr/33/80.1130.md)
- [§80.1132. Estero-Morro Bay, CA.](/cfr/33/80.1132.md)
- [§80.1134. Monterey Harbor, CA.](/cfr/33/80.1134.md)
- [§80.1136. Moss Landing Harbor, CA.](/cfr/33/80.1136.md)
- [§80.1138. Santa Cruz Harbor, CA.](/cfr/33/80.1138.md)
- [§80.1140. Pillar Point Harbor, CA.](/cfr/33/80.1140.md)
- [§80.1142. San Francisco Harbor, CA.](/cfr/33/80.1142.md)
- [§80.1144. Bodega and Tomales Bay, CA.](/cfr/33/80.1144.md)
- [§80.1146. Albion River, CA.](/cfr/33/80.1146.md)
- [§80.1148. Noyo River, CA.](/cfr/33/80.1148.md)
- [§80.1150. Arcata-Humboldt Bay, CA.](/cfr/33/80.1150.md)
- [§80.1152. Crescent City Harbor, CA.](/cfr/33/80.1152.md)
- [§80.1305. Chetco River, OR.](/cfr/33/80.1305.md)
- [§80.1310. Rogue River, OR.](/cfr/33/80.1310.md)
- [§80.1315. Coquille River, OR.](/cfr/33/80.1315.md)
- [§80.1320. Coos Bay, OR.](/cfr/33/80.1320.md)
- [§80.1325. Umpqua River, OR.](/cfr/33/80.1325.md)
- [§80.1330. Siuslaw River, OR.](/cfr/33/80.1330.md)
- [§80.1335. Alsea Bay, OR.](/cfr/33/80.1335.md)
- [§80.1340. Yaquina Bay, OR.](/cfr/33/80.1340.md)
- [§80.1345. Depoe Bay, OR.](/cfr/33/80.1345.md)
- [§80.1350. Netarts Bay, OR.](/cfr/33/80.1350.md)
- [§80.1355. Tillamook Bay, OR.](/cfr/33/80.1355.md)
- [§80.1360. Nehalem River, OR.](/cfr/33/80.1360.md)
- [§80.1365. Columbia River Entrance, OR/WA.](/cfr/33/80.1365.md)
- [§80.1370. Willapa Bay, WA.](/cfr/33/80.1370.md)
- [§80.1375. Grays Harbor, WA.](/cfr/33/80.1375.md)
- [§80.1380. Quillayute River, WA.](/cfr/33/80.1380.md)
- [§80.1385. Strait of Juan de Fuca.](/cfr/33/80.1385.md)
- [§80.1390. Haro Strait and Strait of Georgia.](/cfr/33/80.1390.md)
- [§80.1395. Puget Sound and adjacent waters.](/cfr/33/80.1395.md)
- [§80.1410. Hawaiian Island Exemption from General Rule.](/cfr/33/80.1410.md)
- [§80.1420. Mamala Bay, Oahu, HI.](/cfr/33/80.1420.md)
- [§80.1430. Kaneohe Bay, Oahu, HI.](/cfr/33/80.1430.md)
- [§80.1440. Port Allen, Kauai, HI.](/cfr/33/80.1440.md)
- [§80.1450. Nawiliwili Harbor, Kauai, HI.](/cfr/33/80.1450.md)
- [§80.1460. Kahului Harbor, Maui, HI.](/cfr/33/80.1460.md)
- [§80.1470. Kawaihae Harbor, Hawaii, HI.](/cfr/33/80.1470.md)
- [§80.1480. Hilo Harbor, Hawaii, HI.](/cfr/33/80.1480.md)
- [§80.1490. Apra Harbor, U.S. Territory of Guam.](/cfr/33/80.1490.md)
- [§80.1495. U.S. Pacific Island Possessions.](/cfr/33/80.1495.md)
- [§80.1705. Alaska.](/cfr/33/80.1705.md)