25 Jul, 1944
With her trials and initial training completed USS Besugo (Cdr. T.L. Wogan) departs New London bound for Key West.

1 Aug, 1944
USS Besugo (Cdr. T.L. Wogan) arrives at Key West for further training.

13 Aug, 1944
USS Besugo (Cdr. T.L. Wogan) departs Key West bound for the Panama Canal Zone.

19 Aug, 1944
USS Besugo (Cdr. T.L. Wogan) arrives at Balboa in the Panama Canal Zone.

22 Aug, 1944
USS Besugo (Cdr. T.L. Wogan) departs Balboa, transits the Panama Canal and proceed to Pearl Harbour.

7 Sep, 1944
USS Besugo (Cdr. T.L. Wogan) arrives at Pearl Harbour.

26 Sep, 1944
USS Besugo (Cdr. T.L. Wogan) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol off the Bungo Suido.

30 Sep, 1944
USS Besugo (Cdr. T.L. Wogan) toppes off with fuel at Midway.

6 Oct, 1944
Operating in the North Pacific, attacked a patrol craft, estimated at 300 tgr, with the deck gun, claiming damage. The target is unidentified.

16 Oct, 1944
USS Besugo (Cdr. T.L. Wogan) attacks a convoy en route Oite-Formosa, torpedoes and damages the Japanese destroyer Suzutsuki (2700 tons, offsite link) off Toizaki, Japan in position 32º30'N, 132º36'E.
The sub attacked on the surface in darkness, about 2200 hrs, using radar data and the XO assessed the target as a heavy cruiser, causing the CO to fire a full bow salvo which obtained only 1 hit. This torpedo removed the destroyer's bow and sent her to the repair yard for a considerable length of time. (see map)

24 Oct, 1944
USS Besugo (Cdr. T.L. Wogan) torpedoes and heavily damages the Japanese corvette Kaibokan No.132 (740 tons) about 130 nautical miles south of Ashizuri Zaki, Japan in position 30º19'N, 132º49'E. (see map)

29 Oct, 1944
Patrolling south of Honshu, Besugo sighted the surviving Japanese ships from the Battle of Capo Engano, which included the hybrid batlleship/carriers Hyuga nad Ise, but was unable to reach attack position.

5 Nov, 1944
USS Besugo (Cdr. T.L. Wogan) ends her 1st war patrol at Saipan.

10 Nov, 1944
USS Besugo (Cdr. T.L. Wogan) departs Saipan for her 2nd war patrol. She is ordered to patrol in the South China and Sulu Seas.

22 Nov, 1944
Between 0500 hrs and midnight, USS Besugo (Cdr. T.L. Wogan) makes 3 separate attacks against a convoy, in the last of which she torpedoes and sinks the Japanese landing ship T 151 (870 tons) off the northern tip of Palawan Island in position 11º22'N, 119º07'E.
Cdr Wogan also claims the sinking of a 5,000-ton oiler with 1 hit out of 4 torpedoes fired and of a 3,000-ton lighter or barge also with 1 hit out of 4 torpedoes. Both these attacks were on surfaced radar bearings and the claimed sinkings are so far unconfirmed. (see map)

4 Dec, 1944
USS Besugo (Cdr. T.L. Wogan) ends her 2nd war patrol at Fremantle, Australia.

24 Dec, 1944
USS Besugo (Cdr. T.L. Wogan) departs Fremantle for her 3rd war patrol. She is ordered to patrol in the South China Sea and the Gulf of Siam.

27 Dec, 1944
USS Besugo (Cdr. T.L. Wogan) toppes off with fuel at Exmouth Gulf.

6 Jan, 1945
In a night attack on the surface USS Besugo (Cdr. T.L. Wogan) torpedoes and sinks the Japanese fleet tanker Nichei Maru (10020 GRT, offsite link) in the Gulf of Siam in position 06º45'N, 102º55'E with 3 hits out of 6 torpedoes fired.
Japanese records, however, indicate the loss as having taken place at 04º30'N, 103º30'E, which is a considerable distance, 143 nautical miles, from the sub's attack position. The discrepancy in the records cannot be resolved at this time. (see map)

24 Jan, 1945
USS Besugo (Cdr. T.L. Wogan) torpedoes and damages the Japanese merchant tanker Sarawak Maru (5135 GRT) off the east coast of Malaya in position 06º00'N, 103º45'E. (see map)

2 Feb, 1945
USS Besugo (Cdr. T.L. Wogan) torpedoes and sinks the Japanese corvette Kaibokan No.144 (740 tons) north-east of Kuantan, Malaya, in position 04º11'N, 104º35'E. (see map)

15 Feb, 1945
USS Besugo (Cdr. T.L. Wogan) ends her 3rd war patrol at Fremantle.

19 Feb, 1945
Lt.Cdr. H.E. Miller takes over command from Cdr. T.L. Wogan.

24 Mar, 1945
USS Besugo (Lt.Cdr. H.E. Miller) departs Fremantle for her 4th war patrol. She is ordered to patrol in the Java and Sunda Seas.

6 Apr, 1945
USS Besugo (Lt.Cdr. H.E. Miller) torpedoes and sinks the Japanese minesweeper W 12 (630 tons, offsite link) off Saniri harbor, Saeku Strait, Soembawa island, Netherlands East Indies in position 08º13'S, 119º14'E. Having expended 6 torpedoes on this target (having mis-identified the sweeper for a 1200-ton gunboat) USS Besugo now returned to Fremantle for a new load of torpedoes and some minor repairs. (see map)

16 Apr, 1945
With a new load of torpedoes USS Besugo (Lt.Cdr. H.E. Miller) departs Fremantle again to resume her 4th war patrol.

23 Apr, 1945
At 1300 hrs on 23 April 1945 the German submarine U-183 was sunk in the Java Sea, off the south-east corner of Bawean island, in position 04º50'S, 112º52'E, by one torpedo out of 6 fired from the US submarine USS Besugo (Lt.Cdr. H.E. Miller). (see map)

28 Apr, 1945
USS Besugo (Lt.Cdr. H.E. Miller) sinks the Japanese guardboat Otome Maru (199 GRT) with gunfire south-east of Borneo in position 05º45'S, 107º30'E. (see map)

20 May, 1945
USS Besugo (Lt.Cdr. H.E. Miller) ends her 4th war patrol at Subic Bay, Philippines.

13 Jun, 1945
USS Besugo (Lt.Cdr. H.E. Miller) departs Subic Bay for her 5th war patrol. She is ordered to patrol in the South China Sea off the French Indo-China coast.

27 Jul, 1945
USS Besugo (Lt.Cdr. H.E. Miller) ends her 5th war patrol at Fremantle.