 New Jersey 's main battery consisted of nine 16 " / 50 caliber Mark 7 guns in three three @-@ gun turrets , which could fire 2 @,@ 700 @-@ pound ( 1 @,@ 225 kg ) armor @-@ piercing shells some 23 miles ( 37 km ) . Her secondary battery consisted of twenty 5 " / 38 caliber guns mounted in twin @-@ gun dual purpose ( DP ) turrets , which could hit targets up to 9 miles ( 14 km ) away . With the advent of air power and the need to gain and maintain air superiority came a need to protect the growing fleet of allied aircraft carriers , so New Jersey was fitted with an array of Oerlikon 20 mm and Bofors 40 mm anti @-@ aircraft guns . When reactivated in 1968 , New Jersey had her 20 mm and 40 mm AA guns removed and was tailored for use as a heavy bombardment ship . When reactivated in 1982 , New Jersey had four twin 5 " / 38 caliber DP mounts removed . She was outfitted with four Phalanx CIWS mounts for protection against missiles and aircraft , and eight Armored Box Launchers and eight Quad Cell Launchers designed to fire Tomahawk missiles and Harpoon missiles , respectively . 
