  FE343/90; OPR-B660 -- 200% SIDE SCAN SONAR INDICATES A WRECK IN POSITION 41/15/56.2 NORTH LATITUDE, 072/05/17.7 WEST LONGITUDE (NAD83).  DIVER INVESTIGATION YIELDED A LEAST DEPTH OF 16-METERS (52-FOOT DANGEROUS WRECK CHARTED).  FOUR OTHER SIGNIFICANT C