There were three different sets of FRAM upgrades. During refitting in the early 1950s, FRAM I "Fletcher"-class destroyers gave up No. 2, 3 and 4 5-inch/38 caliber gun mounts. A trainable Mark 15 Hedgehog mount took the place of No. 2 gun, connected to a new, enlarged sonar suite. All topside torpedo tubes were removed and replaced with two tubes mounted in the after deckhouse. One twin 3-inch/50 caliber gun mount was placed aft, atop the after deckhouse. There were variations such as , which had the 5-inch/38 mounts 3 and 4 removed in exchange for two twin 3-inch/50 caliber gun mounts above the after deckhouse connected to a computer controlled aft director. FRAM II changes saw the replacement of the Hedgehog mount with a Mark 108 Weapon Alpha ASW rocket launcher, the addition of two new triple Mark 32 torpedo tubes for the Mk.44 torpedo and the removal of the 3 in guns for the DASH hangar and flight deck. The only "Fletcher"-class destroyers to receive the FRAM II upgrade were , and .