(a) Description: The area within a line 500 meters from each point on the structure's outer edge. The position of the center of the structure is 34-07-30" N, 119-24-01" W.
(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, Eleventh Coast Guard District. [CGD11-87-06, 52 FR 9657, Mar. 26, 1987]