(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 34-27-19 N, 120-38-47 W.
(b) Regulations: 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. [CGD 11-84-01, 49 FR 33015, Aug. 20, 1984]