6 Apr, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol off the Bonin Islands.

22 Apr, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) sinks a Japanese trawler with gunfire off the Bonin Islands in position 27º37'N, 141º46'E. (see map)

25 Apr, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese army cargo ship Tetsuyo Maru (2130 GRT) north-west of Chichi Jima in position 28º55'N, 140º28'E. (see map)

26 Apr, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese army cargo ship Noshiro Maru (2333 GRT) off Miko Jima in position 28º42'N, 141º26'E. (see map)

28 May, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) ends her 1st war patrol at Majoro.

20 Jun, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) departs Majuro for her 2nd war patrol. She is ordered to patrol off the Palau's.

4 Jul, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese troop transport Tama Maru (3052 GRT) about 60 nautical miles northwest of Palau in position 07º44'N, 133º17'E. (see map)

31 Jul, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) ends her 2nd war patrol at Brisbane, Australia.

16 Aug, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) departs Brisbane for her 3rd war patrol. She is ordered to patrol in the Philippines.

15 Sep, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese landing ship T 3 (1500 tons) off Pagubas, Mindanao, Philippines in position 05º35'N, 125º24'E. (see map)

29 Sep, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) ends her 3rd war patrol at Brisbane.

27 Oct, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) departs Brisbane for her 4th war patrol. She is ordered to patrol in the South China Sea.

15 Nov, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese army cargo ship Toyo Maru (2704 GRT) off Mindoro, Philippines in position 12º25'N, 120º55'E. (see map)

22 Nov, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) torpedoes and sinks the Japanese army cargo ship Dowa Maru (1916 GRT) north-west of Borneo in position 10º23'N, 114º21'E. (see map)

27 Dec, 1944
USS Guavina (Lt.Cdr. C. Tiedeman) ends her 4th war patrol at Brisbane.

23 Jan, 1945
USS Guavina (Cdr. R.H. Lockwood) departs Brisbane for her 5th war patrol. She is ordered to patrol in the South China Sea.

7 Feb, 1945
USS Guavina (Cdr. R.H. Lockwood) torpedoes and sinks the Japanese merchant tanker Taigyo Maru (6892 GRT) about 250 nautical miles south of Saigon, French Indo-China in position 06º45'N, 106º00'E. (see map)

20 Feb, 1945
USS Guavina (Cdr. R.H. Lockwood) torpedoes and sinks the Japanese merchant tanker Eiyo Maru (8673 GRT) off Cape Padaran, French Indo-China in position 11º22'N, 109º22'E. (see map)

5 Mar, 1945
USS Guavina (Cdr. R.H. Lockwood) ends her 5th war patrol at the Fiji Islands.

21 Mar, 1945
USS Guavina (Cdr. R.H. Lockwood) departs the Fiji Islands for her 6th war patrol. Once agian she is ordered to patrol in the South China Sea.

8 May, 1945
USS Guavina (Cdr. R.H. Lockwood) ends her 6th war patrol at Pearl Harbour. She is now ordered to the Bethlehem Steel Shipyard at San Francisco for a major overhaul.