33 CFR § 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.