  FE355/90--OPR-D111-HE; WHILE INVESTIGATING AWOIS ITEM 7529, AN OBSTRUCTION WAS LOCATED AND INVESTIGATED BY DIVERS IN LAT.  36-52-03.15N, LONG.75-44-53.45W (NAD 83), WITH AN ESTIMATED DEPTH OF 17.7 METERS (58 FEET). EVALUATOR RECOMMENDS CHARTING A DANGE