 At Wonsan 11 July – 12 July , New Jersey fired one of the most concentrated bombardments of her Korean duty . For nine hours the first day , and for seven the second , her guns opened fire on gun positions and bunkers on Hodo Pando and the mainland with telling effect . At least ten enemy guns were destroyed , many damaged , and a number of caves and tunnels sealed . New Jersey smashed radar control positions and bridges at Kojo 13 July , and was once more on the east coast bombline 22 July – 24 July to support South Korean troops near Kosong . These days found her gunners at their most accurate : A large cave , housing an important enemy observation post was closed , the end of a month @-@ long United Nations effort , and a great many bunkers , artillery areas , observation posts , trenches , tanks and other weapons were destroyed . 
