  LNM42/72--10/17/72; 105 FT CLAM BOAT, SALTY SEA, HAS SUNK IN 60 FT OF WATER APPROXIMATELY 4 MILES SSE OF CHESAPEAKE LIGHT AT LAT 36-50.5N, LONG 75-41W; MARKED BY 2 STROBE LIGHTS; ATTACHMENT, DATED 10/17/72, SPECIAL INVESTIGATION BY LAUNCH FROM AMC; POS