33 CFR § 80.815 - Mobile Bay, AL to the Chandeleur Islands, LA.

---
identifier: "/us/cfr/t33/s80.815"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 80.815 - Mobile Bay, AL to the Chandeleur Islands, LA."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "80.815"
section_name: "Mobile Bay, AL to the Chandeleur Islands, LA."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "D"
subchapter_name: "INTERNATIONAL NAVIGATION RULES"
part_number: "80"
part_name: "COLREGS DEMARCATION LINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "14 U.S.C. 102, 503; 33 U.S.C. 151(a)."
regulatory_source: "CGD 77-118a, 42 FR 35784, July 11, 1977, unless otherwise noted. Redesignated by CGD 81-017, 46 FR 28154, May 26, 1981."
cfr_part: "80"
---


# 80.815 Mobile Bay, AL to the Chandeleur Islands, LA.

(a) A line drawn across the inlets to Little Lagoon as an extension of the general trend of the shoreline.

(b) A line drawn from 30°14′41.4″ N., 088°01′26.5″ W. (Mobile Point Light) to 30°15′13.3″ N., 088°03′22.6″ W. (Dauphin Island Channel Light 1) to the eastern corner of Fort Gaines at Pelican Point.

(c) A line drawn from the western-most extremity of Dauphin Island to the easternmost extremity of Petit Bois Island.

(d) A line drawn from Horn Island Pass Entrance Range Front Light on Petit Bois Island to the easternmost extremity of Horn Island.

(e) An east-west line (latitude 30°14.7′ N.) drawn between the westernmost extremity of Horn Island to the easternmost extremity of Ship Island.

(f) A curved line drawn following the general trend of the seaward, highwater shoreline of Ship Island.

(g) A line drawn from the Ship Island Light to Chandeleur Light; thence in a curved line following the general trend of the seaward, highwater shorelines of the Chandeleur Islands to the island at latitude 29°44.1′ N., longitude 88°53.0′ W.; thence to latitude 29°26.5′ N., longitude 88°55.6′ W.

[CGD 77-118a, 42 FR 35784, July 11, 1977. Redesignated by CGD 81-017, 46 FR 28154, May 26, 1981, as amended by CGD 84-091, 51 FR 7787, Mar. 6, 1986; CGD 89-068, 55 FR 31831, Aug. 6, 1990; 55 FR 33577, Aug. 14, 1990; USCG-2014-0410, 79 FR 38431, July 7, 2014]