(a) Description. The Horn Mountain Spar is in the deepwater area of the Gulf of Mexico at Mississippi Canyon 127. The facility is located at: 28°51′57.5994″ N, 88°3′22.32″ W, (NAD 83) and the area within 500 meters (1640.4 feet) from each point on the facililty structure's outer edge is a safety zone.

(b) Regulation. No vessel may enter or remain in this safety zone except for the following:

(1) An attending vessel, as defined in 147.20;

(2) A vessel under 100 feet in length overall not engaged in towing; or

(2) A vessel authorized by the Commander, Eighth Coast Guard District or a designated representative.

(c) Requests for permission. Persons or vessels requiring authorization to enter the safety zone must request permission from the Commander, Eighth Coast Guard District or a designated representative. If permission is granted, all persons and vessels shall comply with the instructions of the Commander or designated representative.