  LNM 39/87--"SUBMERGED OBSTRUCTION (PILING - CLEARANCE OVER OBSTRUCTION UNKNOWN) IN 30-19-24N, 88-30-49(PA)"
  H11385-- OPR-J376-NRT-04; Only half of the search radius was investigated with 200% SSS.  Retain as charted.  (Updated CEH 12/2008)