StacksVerified U.S. regulatory reference

33 CFR §147.833

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
  1. (a)Description. Na Kika FDS, Mississippi Canyon 474 “A” (MC 474 “A”), located at position 28°31′14.86″ N, 88°17′19.69″ 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].
  2. (b)Regulation. No vessel may enter or remain in this safety zone except the following: (1) An attending vessel;
    1. (2)A vessel under 100 feet in length overall not engaged in towing; or
    2. (3)A vessel authorized by the Commander, USCG Heartland District.