  FE354SS/90-- OPR-D111-90; ITEM NO. 4; UNCHARTED OBSTRUCTION LOCATED BY WHITING (H-10337) IN LAT. 36-50-16.64N, LONG. 75-48-10.71W. ESTIMATED DEPTH OF 14.7 METERS (48 FEET). ALSO LOCATED BY HECK ON PRESENT SURVEY WITH AN ESTIMATED DEPTH OF 15 METERS (49