  LNM28/91--07/09/91, 8TH CGD; 12,500 POUND CONCRETE SINKER SUBMERGED IN APPROXIMATELY 30-14-15.2N, 88-02-10.4W (NAD 83).  (ENT 8/02, PSH)
  S-J610-WH-02--HLS: 200% SSS coverage over entire 150m AWOIS radius. No significant contacts were found in AWOIS