 New Jersey returned to the key task of direct support to troops at Kosong 7 June . On her first mission , she completely destroyed two gun positions , an observation post , and their supporting trenches , then stood by on call for further aid . She then sailed back to Wonsan for a day @-@ long bombardment 24 June , aimed at guns placed in caves . The results were excellent , with eight direct hits on three caves , one cave demolished , and four others closed . Next day she returned to troop support at Kosong , her assignment until 10 July , aside from necessary withdrawal for replenishment . 
