at a range of . Batfish closed the range and submerged to radar depth at 21:50 at a range of . At 22:02, at a range of either or , according to different sources, she fired four Mark 18 electric torpedoes from her bow tubes. The first torpedo hit, blowing the Japanese submarine apart and sinking her almost immediately at . The victim later was identified as Ro-112. At 02:13 or 02:15, according to different sources, on 13 February 1945, Batfish gained SJ radar contact at a range of . on a target in the vicinity of Babuyan between Calayan and Daupin Island proceeding on a southeasterly course, on track from Formosa to Batulinao on Luzon. The contact disappeared from radar at 02:41 at a range of , indicating that it was a submerging submarine. It surfaced at 03:10, and Batfish regained radar and radar detector contact with it at a range of . Batfish submerged to radar depth at 04:12 with the Japanese submarine away, and at a range of fired three torpedoes from her stern tubes at 04:48. The first torpedo hit the submarine and blew her apart in large yellow fireball at , sinking her so quickly that the other two torpedoes missed. The submarine later was identified as RO-113. The three Japanese submarines' use of radar, which, while helping them locate enemy targets, also made them vulnerable to attack because of Batfish′s capability to detect their radar emissions. There were no survivors from any of the three Japanese submarines. Batfish had performed the unparalleled feat of sinking three enemy submarines in only four days. She headed for Guam on 16 February 1945 in company with Blackfish. As she pulled alongside the submarine tender in Apra Harbor on 21 February 1945, U.S. Navy photographers greeted the successful "sub killer." She continued on to Hawaii in company with Archerfish and reached Pearl Harbor on 3 March 1945. She received a Presidential Unit Citation for the patrol. March–June 1945 On 6 March 1945, Batfish departed Pearl Harbor bound for San Francisco, California, which she reached on 13 March 1945. She entered the shipyard at the Bethlehem Steel Shipbuilding Company there, which began modifying Batfish to participate in Operation Barney, a projected foray into the Japanese minefields guarding the southern entrance to the Sea of Japan by a nine-submarine unit equipped with new mine detectors. However, Batfish′s overhaul uncovered mechanical