33 CFR 147.807 - West Delta 143 Platform safety zone.
(a)Description. The West Delta 143 Platform is located at position 28°39′42″ N, 89°33′05″ W. The area within 500 meters (1640.4 feet) from each point on the structure's outer edge, not to extend into the adjacent Mississippi River Approach Fairway, is a safety zone.
(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.