  H10952/00-- OPR-E350-RU; AN UNCHARTED SUBMERGED OBSTRUCTION WAS LOCATED BY SIDE SCAN SONAR SEARCH. DIVER LD OF 50 FEET IN LAT. 37-01-02,9N, LONG. 76-02-46.2W.  DIVERS DESCRIBE A LARGE METAL BOX, 30 FEET LONG AND 6 FEET WIDE, OPEN ON TOP WITH 3 EVENLY S