21 Jun, 1944
With her trials and initial training completed USS Barbel (Lt.Cdr. R.A. Keating) arrives at Pearl Harbour.

15 Jul, 1944
USS Barbel (Lt.Cdr. R.A. Keating) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol off the Ryukyu Islands.

5 Aug, 1944
USS Barbel (Lt.Cdr. R.A. Keating) torpedoes and sinks the Japanese merchant passenger/cargo ship Miyako Maru (970 GRT) off Tokuno Jima in position 27º36'N, 128º54'E. (see map)

7 Aug, 1944
USS Barbel (Lt.Cdr. R.A. Keating) torpedoes and sinks the Japanese wooden-hulled army cargo ship Sakura Maru No.11 (???? GRT) southwest of Tokuno Jima in position 27º36'N, 121º46'E.
Note that the sub's CO claimed the sinking of a Tonan maru class ship (oilers of over 10,000 tgr) and the ship's actual identity was established through ULTRA intercepts. (see map)

9 Aug, 1944
USS Barbel (Lt.Cdr. R.A. Keating) torpedoes and sinks the Japanese army cargo ship Yagi Maru (1937 GRT) and the Japanese merchant cargo ship Boko Maru (2333 GRT, former British Sagres) north of Okinoshima in position 27º56'N, 128º47'E. (see map)

13 Aug, 1944
USS Barbel (Lt.Cdr. R.A. Keating) torpedoes and sinks the Japanese guardboat Koan Maru (223 GRT) 2 nautical miles east off Amami Oshima in position 28º31'N, 129º18'E. (see map)

21 Aug, 1944
USS Barbel (Lt.Cdr. R.A. Keating) ends her 1st war patrol at Majuro.

13 Sep, 1944
USS Barbel (Lt.Cdr. R.A. Keating) departs Majuro for her 2nd war patrol. She is ordered to patrol in the East China Sea.

25 Sep, 1944
USS Barbel (Lt.Cdr. R.A. Keating), in attack against a convoy, torpedoes and sinks the Japanese merchant cargo ship Bushu Maru (1223 GRT) off Tokara Gunto in position 29º46'N, 129º40'E.
At the same time the sub claims the sinking of a "600-ton destroyer escort" as well as that of a 4,000-ton freighter, neither of which finds confirmation in japanese sources. (see map)

13 Oct, 1944
In the East China Sea, Barbel makes a torpedo attack in twilight (about 0600 hrs) on radar bearing against a convoy, claiming one hit and damage on a target identified as a 10,000-ton tanker and the sinking of a 1500-ton destroyer at position 29º38'N, 127º27'E. Neither claim is confirmed by Japanese sources. (see map)

24 Oct, 1944
USS Barbel (Lt.Cdr. R.A. Keating) ends her 2nd war patrol at Saipan.

30 Oct, 1944
USS Barbel (Lt.Cdr. R.A. Keating) departs Saipan for her 3rd war patrol. She is ordered to patrol in the South China Sea.

15 Nov, 1944
USS Barbel (Lt.Cdr. R.A. Keating) attacks a convoy in the South China Sea about 250 nautical miles east of Tourane, French Indo-China, torpedoing and sinking the Japanese troop transports Misaki Maru (4422 BRT) in position 15º10'N, 112º40'E, and Sugiyama Maru (4379 GRT) in position 15º14'N, 112º14'E. (see map)

7 Dec, 1944
USS Barbel (Lt.Cdr. R.A. Keating) ends her 3rd war patrol at Fremantle, Australia.

5 Jan, 1945
USS Barbel (Lt.Cdr. C.L. Raguet) departs Fremantle, Australia for her 4th war patrol. She is ordered to patrol in the South China Sea.

8 Jan, 1945
USS Barbel (Lt.Cdr. C.L. Raguet) toppes off with fuel at Exmouth Gulf.

3 Feb, 1945
USS Barbel (Lt.Cdr. C.L. Raguet) sent a message reporting numerous aircraft contacts daily. She had been attacked by aircraft three times with depth charges, and would transmit a message tomorrow night giving more information. This was the last heard from her.