 Throughout January and into February New Jersey operated in support of the Marines . On 10 February the battleship left to reinforce the Korean 2nd Marine Brigade operating near Da Nang . The battleship 's target was a suspected subterranean staging area for a Viet Cong regiment . New Jersey 's big guns went to work on the complex , firing 16 inch shells into tunnels and bunkers to aid the ground troops . On 14 February the battleship steamed south of the DMZ to provide support for the 3rd Marine Division , in the process destroying an anti @-@ aircraft site with her big guns . The next day New Jersey fired on an enemy rocket site northeast of Con Thien , destroying the facility , then trained her guns on known Communist positions to harass PAVN forces . On 22 February New Jersey responded to an urgent request for fire support from the besieged <unk> observation post near the DMZ . For the next six hours New Jersey fired her guns , ultimately repelling the attacking force . 
