around Mindanao in the Philippines. During the patrol, she made only one contact, when she attacked a convoy between Halmahera and Taland Island on 25 June 1944. Before the night was over, she scored three torpedo hits on Yamamiya Maru, a 6,440-gross register ton Imperial Japanese Army cargo ship, and sank her. On 16 July 1944, Bashaw moored alongside the submarine tender in Seeadler Harbor at Manus Island in the Admiralty Islands for a refit. Third war patrol After training exercises, Bashaw stood out of Seeadler Harbor for her third war patrol on 7 August 1944, bound for the Mindanao Sea and Moro Gulf in Philippine waters. Opportunities to attack proved scarce but, on 8 September 1944 she approached what turned out to be the Japanese cargo ship Yanagigawa Maru. Bashaw fired a six-torpedo salvo from periscope depth and scored three hits that sent Yanagigawa Maru to the bottom. She completed her patrol by providing lifeguard services during carrier air strikes against Cagayan, Mindanao. On 9 September 1944, she assisted four airplanes to sink a 225-gross register ton interisland supply ship loaded with drums of fuel oil. Bashaw rescued one of the ship's crew members and later turned him over to the authorities in Australia. Bashaw also rescued an American fighter pilot on 19 September 1944 before ending her patrol at Brisbane on 4 October 1944. Fourth war patrol Following a refit, Bashaw began her fourth war patrol on 27 October 1944 in a coordinated attack group which also included the submarines Flounder (SS-251) and . They proceeded to the coast of Japanese-occupied French Indochina to patrol in the South China Sea, but found meager pickings. Finally, a small Japanese tanker crossed Bashaw′s track on 21 November 1944. Bashaw fired four torpedoes and scored one hit. The lone hit failed to damage the tanker severely enough to sink her, and Bashaw was unable to reach a firing position again. Continuing the patrol, Bashaw sighted a large and heavily escorted Japanese task force on 14 December 1944. Although unable to attack, she reported the contact. On 25 December 1944, Bashaw made a submerged transit of Lombok Strait while returning to Australia, where she arrived at Fremantle on 31 December 1944. She began the year 1945 undergoing refit alongside Euryale. Fifth war patrol Bashaw stood out of Fremantle on 26 January 1945 and set course for her designated patrol area along the