sentences:  At first, this battery's effectiveness against aircraft diminished as planes became faster, but this changed toward the end of World War II through a combination of an upgrade to the Mk37 System and the development of the VT (Variable Time) proximity fuze.In preparation for the reactivations in the 1960s and 1980s, the battery was updated to the latest gun and fire control system modifications.In the 1968 upgrade to USS "New Jersey" for service off Vietnam, three Mark 56 Gun Fire Control Systems were installed, two on either side just forward of the aft stack, and one between the aft mast and the aft Mk 38 Director tower.