Section 147.1111 - Platform EUREKA safety zone(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 33-33-50 N, 118-07-00 W.(b)Regulations: No vessel may enter or remain in this safety zone except the following:(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 33016, Aug. 20, 1984