Section 147.871 - Safety Zone, Constitution Spar, Outer Continental Shelf Facility, Green Canyon 680, Gulf of Mexico(a)Description. The Constitution Spar is in the deepwater area of the Gulf of Mexico at Green Canyon Block 680. The facility is located at 27°17'31.92" N, 90°58'4.8" W, (NAD 83) and the area within 500 meters (1640.4 feet) from each point on the facility structure's outer edge is a safety zone.(b)Regulation. No vessel may enter or remain in the safety zone described in paragraph (a) of this section except for the following: (1) An attending vessel, as defined in 147.20(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 or a designated representative.(c)Requests for Permission. Persons or vessels requiring authorization to enter the safety zone described in paragraph (a) of this section must request permission from the Commander, Eighth Coast Guard District or a designated representative. If permission is granted, all persons and vessels shall comply with the instructions of the Commander or designated representative. 88 FR 22914 , Apr. 14, 2023