  CL767/82--LETTER FROM DEPT. OF THE NAVY TO NOS DATED JUNE 7, 1982;  FORMER DRY DOCK CAISSON NO. 2 WAS DISPOSED OF ON MAY 26, 1982.  RELEASED FROM TUG IN LAT. 42-24-08N, LONG. 70-34-08W.  CAISSON WAS COMPLETELY SUBMERGED APPROX. 1 HOUR LATER IN LAT. 42-