(a) Description. The Matterhorn Tension Leg Platform A (Matterhorn TLP), Mississippi Canyon 243 (MC 243), located at position 28°44′32″ N, 88°39′32″ 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.