(a) The anchorage grounds--(1) Explosives Anchorage A. Inside the south section of the main breakwater 700 feet wide starting at a point 500 feet southerly from the south end of the north section and extending approximately 153[deg] true, 3,000 feet parallel to the line of the south section of the main breakwater. [CGFR 67-46, 32 FR 17728, Dec. 12, 1967, as amended by CGD 77-210, 44 FR 50040, Aug. 27, 1979]