9 Oct, 1944
With her trials and training completed USS Atule (Lt.Cdr. J.H. Maurer) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol in the Philippines.

21 Oct, 1944
USS Atule (Lt.Cdr. J.H. Maurer) toppes off with fuel at Saipan. She departs the next day.

1 Nov, 1944
USS Atule (Lt.Cdr. J.H. Maurer) torpedoes and sinks the Japanese sinks troop transport Asama Maru (16975 GRT) in Luzon Strait, in position 20º09'N, 117º38'E. (see map)

21 Nov, 1944
USS Atule (Lt.Cdr. J.H. Maurer) torpedoes and sinks the Japanese minesweeper W 38 (648 tons) south-west of Formosa in position 21º21'N, 119º45'E. (see map)

25 Nov, 1944
USS Atule (Lt.Cdr. J.H. Maurer) attacks Japanese convoy MATA-34. At 0125 hrs, firing at overlapping targets, torpedoes and sinks the Japanese merchant cargo ship Manju Maru (7266 GRT, carrying 1300 military personnel) and the escorting patrol boat #38 ex DD Yomogi, 935 ts, SE of Sabtang Island, Luzon in position 20º14'N, 121º40'E. Of the passengers in Manju maru, over 700 were killed in the sinking. (see map)

11 Dec, 1944
USS Atule (Lt.Cdr. J.H. Maurer) ends her 1st war patrol at Majuro.

6 Jan, 1945
USS Atule (Lt.Cdr. J.H. Maurer) departs Majuro for her 2nd war patrol. She is ordered to patrol in the Yellow Sea.

24 Jan, 1945
USS Atule (Lt.Cdr. J.H. Maurer) torpedoes and sinks the Japanese merchant cargo ship Taiman Maru No.1 (6888 GRT) in the Yellow Sea in position 36º47'N, 123º59'E. (see map)

7 Mar, 1945
USS Atule (Lt.Cdr. J.H. Maurer) ends her 2nd war patrol at Midway.

2 Apr, 1945
USS Atule (Lt.Cdr. J.H. Maurer) departs Midway for her 3rd war patrol. She is ordered to patrol south of Honshu, Japan.

11 Apr, 1945
USS Atule (Lt.Cdr. J.H. Maurer) toppes off with fuel at Guam. She departs the next day.

30 May, 1945
USS Atule (Lt.Cdr. J.H. Maurer) ends her 3rd war patrol at Pearl Harbour.

3 Jul, 1945
USS Atule (Lt.Cdr. J.H. Maurer) departs Pearl Harbour for her 4th war patrol. She is ordered to patrol east of Honshu and Hokkaido.

13 Aug, 1945
USS Atule (Lt.Cdr. J.H. Maurer) torpedoes and sinks the Japanese corvette Kaibokan No.6 (740 tons) and torpedoes and damages the Japanese corvette Kaibokan No.16 (740 tons) east of Hokkaido, Japan in position 42º16'N, 142º12'E. (see map)

25 Aug, 1945
USS Atule (Lt.Cdr. J.H. Maurer) ends her 4th war patrol at Pearl Harbour.

13 Nov, 1946
The German submarine U-977 was interned at Mar del Plata, Argentina on 17 August 1945 after a 66-day submerged trip from Norway. The U-boat was handed over to the USA in Boston on 13 November 1945. She was torpedoed off Massachusetts on 13 November 1946 during torpedo trials by USS Atule (Cdr. J.H. Maurer).