(a) Description. Na Kika FDS, Mississippi Canyon 474 ``A'' (MC 474 ``A''), located at position 283114.86" N, 881719.69" 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. [CGD08-03-039, 69 FR 21066, Apr. 20, 2004]