Ala. Code § 33-3-1
It is hereby made the duty of the Alabama State Port Authority to police and maintain general supervision of the harbor and Port of Mobile, as such harbor lines may be established by the authority from time to time, and of all vessels in and about the same; to coordinate with federal, state, and local government officials for the protection of all shipping while in the harbor and port from fires, snags, obstructions, collisions with rafts, barges, and all other watercraft; to facilitate the movement of all vessels and other watercraft into and out of the harbor and port and from point to point therein having due regard to the conformation of, and conditions surrounding the harbor, which shall include that portion of the waters extending from just north of Buoys 7 and 8 as presently located, but more precisely being located at Latitude 30° 09.9' N, Longitude 88° 03.1' W to the north, and including the Theodore Industrial Canal, the Mobile River in the dredged channel, and the Port of Mobile and the Port of Chickasaw, and all dredged channels leading thereto, and such other boundary lines as may be established by the authority. Provided, however, the regulation of shifting vessels by the Harbor Master and deputy harbor masters, by and through duly licensed harbor pilots, who shall actually shift all such vessels, shall be limited to shifting of vessels within the Mobile inner harbor, which is defined as running from a point in the Mobile ship channel in the vicinity of Beacon 74 as presently located, but more precisely being located, at Latitude 30° 37.1'N, Longitude 88° 01.90'W northwardly to the Port of Chickasaw and its tributaries.
Ala. Code § 33-3-1 (1975)