"Nemasket" carried aviation gasoline to Anguar and Peleliu in the Palau Islands from 12 December 1944 until 18 January 1945. She then steamed to Eniwetok to fuel the invasion fleet preparing for the Iwo Jima assault. Arriving off Iwo Jima 20 February, she fueled over two hundred ships in twenty days. The gasoline tanker then shifted to Saipan and Ulithi 9 March, and 4 April she steamed to Kerama Retto, where she spent three months amidst kamikaze attacks and interminable hours at general quarters. She splashed a "Val" 13 May, 100 yards off her port bow.