(a) Description. Thunder Horse Semi-Submersible, Mississippi Canyon 778 (MC 778), located at position 281126" N, 882944" W. The area within 500 meters (1640.4 feet) from each point on the structure's outer edge is a safety zone. These coordinates are based upon [NAD 83].
(b) Regulation. No vessel may enter or remain in this safety zone except the following:
(1) An attending vessel;
(2) A vessel under 100 feet in length overall not engaged in towing; or
(3) A vessel authorized by the Commander, Eighth Coast Guard District. [CGD08-05-019, 70 FR 43770, July 29, 2005]