After a year of rest, refitting, and training, VMTB-131 again deployed to the Pacific Theater on March 29, 1944 this time on board the USS "Petrof Bay". They finally arrived in Guam in August 1944 and flew anti-submarine patrols for the next eight months. On April 27, 1945 the squadron was attached to Marine Aircraft Group 22 (MAG-22) and departed for Okinawa. During the Battle of Okinawa they were based out of Ie Shima, an island just to the northwest of Okinawa, and continued to fly anti-submarine patrols and also provided close air support for American ground forces. On July 25, 1945 they were transferred under the command of Marine Aircraft Group 14 (MAG-14) and went ashore to be based out of Okinawa where they remained until the end of the war. The squadron returned to the west coast and were deactivated on November 16, 1945.