  LNM37/77--CGD8 (8/31/77);  A SUBMERGED OBJECT HAS BEEN REPORTED JUST BELOW THE SURFACE AT APPROXIMATE POSITION 30/08/00.00N, 090/05/24.00W (NAD27).  ATTEMTS TO RELOCATE THE OBSTRUCTION HAVE BEEN UNSUCESSFUL.  (ENTERED 12/01 BY MBH)