  LNM6/75--02/12/75, 3RD CGD; THE 65 FOOT VESSEL DON IS REPORTED SUNK IN APPROXIMATE POSITION LAT 39/20/47.00N, LONG 074/26/46.00W(NAD 27) IN 20 FEET OF WATER.  WRECK IS SLIGHTLY BELOW THE SURFACE CABIN TOP BROKEN ADRIFT AND IS TEMPORARILY MARKED WITH AN