the targets, and a calm, moonlit sea gave the advantage to her adversaries. However, two of the six torpedoes that she fired struck Palembang Maru, which exploded in a tremendous blaze. Two others hit the cargo ship, but Baya could not determine the extent of damage she caused because the escorts drove her deep with depth charges. Baya emerged from the encounter unscathed and then shifted her attention to the Camranh Bay area off French Indochina. Two hours before the start of the midwatch on 20 March 1945, she contacted a single Japanese ship, the auxiliary netlayer Kainan Maru, leaving Phan Rang Bay. Just after midnight, she fired a three-torpedo salvo from her stern torpedo tubes and scored one hit that sank Kainan Maru. Later that morning, Baya fired another stern tube salvo at a convoy of two escort destroyers and a submarine chaser leaving Phan Rang Bay, but her luck did not hold. Her torpedoes missed and she had to dive to avoid the resulting depth charge counterattack that shook her up. Ordered to the newly liberated Subic Bay on Luzon in the Philippines, Baya arrived there on 27 March 1945 for repairs and a refit alongside the submarine tender . Fourth war patrol Baya got underway with Cavalla on 20 April 1945 for her fourth war patrol, again assigned a patrol area off Camranh Bay, where, besides routine submerged patrolling, she and Cavalla were assigned lifeguard duties in support of air strikes against Saigon. On 29 April 1945, a United States Army Air Forces B-24 Liberator bomber which mistook her for a Japanese submarine dropped a bomb which exploded about ahead of Baya while Baya was operating approximately east-northeast of Pulo Cecil de Mer, French Indochina, at . Baya suffered no damage or casualties. On 2 May 1945, Baya joined the submarine in the Gulf of Siam just north of Singapore. The next night, she began tracking a Japanese convoy made up of two gasoline tankers and two escorts. Baya maneuvered into position and fired her bow tubes, but the attack proved unsuccessful. The leading escort, a minelayer, gave chase, but Baya quickly eluded her pursuer. The following day, Baya rendezvoused with Lagarto to plan a coordinated attack on the convoy. The convoy's unusually alert escorts frustrated the efforts of the two submarines, and no opportunities for attack presented themselves that day. Early the next morning Lagarto tried