highly successful patrol 2 November 1944, and was later awarded the Navy Unit Commendation for her outstanding performance. Third and fourth patrols, November 1944 – March 1945 The submarine commenced her third war patrol 25 November, returning to the South China Sea. On this cruise she operated with and , and although several attacks were made, no sinkings resulted. She returned to Fremantle 17 January 1945. Hammerhead departed on her fourth war patrol 19 February, in company with . Patrolling off Cape Varella, she detected a convoy and two escorts 23 February and while closing the cargo ships obtained a perfect shot on an escort. A spread of four torpedoes sank Japanese frigate Yaku. Due to the illness of her commanding officer, the submarine was forced to end her patrol, and moored at Subic Bay 3 March 1945. Fifth and sixth patrols, March – May 1945 Beginning her fifth war patrol 10 March 1945, Hammerhead proceeded to the coast of Indochina, where on 29 March she detected a large escorted convoy. Working her way inside the screen, the submarine was able to get a clear shot at an escort vessel, and a single hit broke her in two. After sinking the escort, Hammerhead damaged other members of the group before retiring. She returned from this war patrol 6 April 1945, mooring at Subic Bay, Philippines. For her sixth war patrol Hammerhead operated in the Gulf of Siam. She arrived 6 May and that night encountered a small tanker and two escorts. After missing with two torpedoes at extreme range the submarine found the mark in a second attack, sinking the tanker Kinrei Maru. Hammerhead attacked other ships of the convoy without success and after a depth charge attack decided to break off. Sighting a cargo carrier 14 May with only an aircraft escort, Hammerhead made a perfect approach and sank the ship with two torpedoes. She returned from this patrol 25 May. Seventh patrol, June – August 1945 Hammerhead departed Fremantle 21 June on her seventh and last war patrol, also carried out in the Gulf of Siam, in company with three other submarines. Her major attack of this patrol occurred 10 July, when she sank cargo ships Sakura Maru and Nanmei Maru No. 5. The patrol was brought to a close 21 August 1945 at Pearl Harbor. Decommissioning, 1945 Hammerhead arrived Mare Island, Calif., for decommissioning 20 August 1945