Section 147.875 - Safety Zone, Horn Mountain Spar, Outer Continental Shelf Facility, Mississippi Canyon 127(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.USCG-2021-0475, 88 FR 21476 , Apr. 11, 2023