Allied Warships

HMS Tuna (N 94)

Submarine of the T class

NavyThe Royal Navy
TypeSubmarine
ClassT 
PennantN 94 
Built byScotts Shipbuilding & Engineering Co. (Greenock, Scotland) 
Ordered8 Dec 1937 
Laid down13 Jun 1938 
Launched10 May 1940 
Commissioned1 Aug 1940 
End service 
History

Sold to be broken up for scrap on 19 December 1945. Scrapped at Briton Ferry, Wales in June 1946.

 

Commands listed for HMS Tuna (N 94)

Please note that we're still working on this section.

CommanderFromTo
1Lt.Cdr. Maurice Kildare Cavenagh-Mainwaring, RN4 Jul 19403 Nov 1941
2Lt. Michael Beauchamp St. John, RN3 Nov 194121 Apr 1942

3Lt. Richard Prendergast Raikes, RN24 Aug 194215 Mar 1943
4Lt. Desmond Samuel Royce Martin, RN15 Mar 19438 Oct 1943
5Lt.Cdr. (retired) John Robert Garstin Harvey, RN8 Oct 194310 Nov 1943
6Lt. James Hugh Miller Somerville, RN10 Nov 194315 Feb 1944
7A/Lt.Cdr. Leslie Frederick Lewis Hill, RNR15 Feb 194421 Nov 1944
8Lt.Cdr. Edward Dudley Norman, DSO, DSC, RN21 Nov 19441 Jun 1945
9Lt.Cdr. Robert Love Alexander, DSO, DSC, RN1 Jun 1945Oct 1945 ?

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Noteable events involving Tuna include:


1 Aug 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) begins her training period off the Scottish West coast.

25 Aug 1940
With her training completed HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) departed from Stornoway bound for Rosyth.

26 Aug 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) arrived at Rosyth.

30 Aug 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) departed from Rosyth for her 1st war patrol. This is a work-up patrol in the North Sea.

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 1st war patrolclick here for bigger map

1 Sep 1940
At 0150 hours HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) fired torpedoes at ' what is identified as ' a submarine in the North Sea about 175 nautical east of Dundee, Scotland in position 56°09'N, 02°15'E.

(All times are zone 1)
0147 hours - Sighted a U-boat bearing red 20 showing an occasional dim white flashing light.

0150 hours - In position 56°09'N, 02°15'E fired four torpedoes from a range of 3000 yards.

0152 hours - Dived. While in the process of doing so a loud explosion was heard.

0200 hours - Three more explosions were heard. These must have been the remaining torpedoes hitting the bottom at the end of their run.

0321 hours - Surfaced. Found nothing in sight but noticed a strong smell of oil fuel.

Note: No German U-boat was operating in this area around this time. It's is not clear what Tuna attacked, if anything at all. As Tuna was on a work-up patrol her crew was rather 'green' and possibly a bit over-excited.

5 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) fires three torpedoes at a suspected U boat contact. No hits were obtained. She also reports being fired upon by the enemy U boat with four torpedoes.

Later this day Tuna ended her 1st war patrol at Rosyth.

(All times are zone 1)
4 September 1940
2200 hours - The Officer of the Watch reported a U-boat diving ahead. As visibility through the periscope was nil, Tuna commenced 'hunting' the U-boat with her Asdic.

2240 hours - In position 56°26'N, 00°43'W the contact was at 2700 yards.

2302 hours - Range was now 900 yards. The target was thought to be on the bottom.

2305 hours - A signal was sent to base asking if destroyers could be sent out to take over the hunt on the enemy. Meanwhile Tuna patrolled over the position 'pinging' throughout in an endeavour to keep the enemy 'down'.

5 September 1940
0243 hours - Contact was now at 2700 yards but altered course towards and closed to 2000 yards.

0250 hours - In position 56°17'N, 02°20W fired three torpedoes at the contact that was right ahead. Depth settings of the torpedoes was 44, 30 and 24 feet.

0251 hours - A torpedo track was thought to be passing close down the port side from astern. Altered course to comb the track. Three more torpedo tracks now passed close down the starboard side. It was now thought that there were two U boats nearby, one ahead and one astern.

0254 hours - Withdrew from the area as this was a situation far too dangerous. Set course for Rosyth and speed up to full ahead on both engines.

0344 hours - Sent signal that Tuna was attacked by an enemy submarine with four torpedoes.

0708 hours - Passed HMS Jackal and HMS Vortigern off May Island. Passed information to them. These destroyers had been sent out to sea to hunt the enemy submarine reported by Tuna.

1039 hours - Secured alongside HMS Forth at Rosyth.

Note: As for the attack on a suspected U boat of 1 September, there was no German U-boat operating in this area. It is not clear what Tuna was attacking or was attacked by.

6 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) departed from Rosyth for Holy Loch.

9 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) arrived at Holy Loch.

15 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) departed from Holy Loch for her 2nd war patrol. She was ordered to patrol in the Bay of Biscay.

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 2nd war patrolclick here for bigger map

22 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) torpedoed and sank the German merchant Tirrana (7230 GRT, built 1938, former Norwegian Tirrana (offsite link) in the Bay of Biscay south of the Gironde estuary, about 15 nautical miles south-west of Soulac-sur-Mer, France in position 45°19'N, 01°20'W.

Tirranna was captured by the German armed merchant cruiser Atlantis in the Indian Ocean about 675 nautical miles east-south-east of Port Louis, Mauritius in position 22°40'S, 69°20'E on 10 June 1940.

(All times are zone 1)
1145 hours - Sighted merchant ship. Commenced attack. No escort was present.

1232 hours - Fired 4 torpedoes from 900 yards. Three hits were observed through the periscope. The target was seen to sink at 1239 hours.

24 Sep 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) torpedoed and sank the German catapult ship Ostmark (1281 GRT, built 1936) in the Bay of Biscay about 35 nautical miles South-West of St. Nazaire, France in position 47°01'N, 03°02'W.

(All times are zone 1)
0421 hours - Sighted three dark objects on the port bow. Altered course and started attack. The contacts were identified as a merchant vessel escorted by two destroyers.

0435 hours - Fired six torpedoes from 8000 yards against the merchant. Went deep upon firing. One of the destroyers was heard to come towards, most likely running down the torpedo tracks. One hit was obtained on the target 6min, 45sec after firing the last torpedo.

No counter attack followed. Tuna set course to the South to resume her patrol off the Gironde.

Note: The Ostmark was escorted by the German minesweepers M 6 and M 12

3 Oct 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) ended her 2nd war patrol at Holy Loch.

23 Oct 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, RN) departed from Holy Loch for her 3rd war patrol. She is to patrol in the Bay of Biscay.

For the daily positions of HMS Tuna during this patrol see the map below.


HMS Tuna 3rd war patrolclick here for bigger map

15 Nov 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 3rd war patrol at Holy Loch.

21 Nov 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) is docked at Ardrossan.

24 Nov 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) is un-docked at Ardrossan and returns to Holy Loch.

12 Dec 1940
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 4th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

18 Dec 1940
At 0430 hours HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) attacks the Italian submarine Brin (offsite link) with torpedoes and gunfire in the Bay of Biscay about 55 nautical miles east of the Gironde estuary in position 45°28'N, 02°27'W. The Italian submarine escapes unharmed.

At 2314 hours HMS Tuna sank the French tug (in German service) Chassiron (172 GRT, built 1901) with gunfire about 25 nautical miles west-south-west of the Gironde estuary in position 45°28'N, 01°38'E.

0403 hours (time zone unknown, not mentioned in patrol report and no log available) Sighted a dark object bearing Green 3°. The object was soon indentified as a submarine conning tower. As HMS Usk was just 20 nautical miles to the North of Tuna and the silhouette resembled that of a U-class submarine a challenge was made. The reply was unreadable. As it was still thought it was Usk, The silhouette did not resemble an Italian submarine and a German U-boat was not expected in pass through this area, a second challenge was made. No reply came on the second challenge and the target turned away.

0430 hours - In position 45°28'N, 02°27'W fired six torpedoes from 1500 yards. The target was not hit, the torpedoes missed on either side. When it was seen that the torpedoes had missed gun action was ordered. After the third round it was thought that a hit was obtained. The enemy increased to full speed and ran for the Gironde. No more hits were obtained and as the enemy submarine was faster range soon increased.

0510 hours - Fired one torpedo but missed.

0520 hours - Fired another torpedo but missed again. Soon after a torpedo wake was sighted, the enemy had fired a stern torpedo but this also missed (according to Italian sources, Brin had fired two stern torpedoes).

0523 hours - A darkened object was reported bearing Red 120°. Almost simultaneously the enemy submarine was seen to make her identification signal. /it was thought that this new contact was the escort for the enemy submarine to the Gironde. Tuna turned away and dived to 200 feet. By HE it was noticed that there were two escort vessels in the area. They remained in the area to hunt Tuna but never made contact and no depth charges were dropped.

----------------------------------------------------------------------

2254 hours - An object was sighted bearing Red 20°. Course was altered towards. Started attack. The target was considered to be an A/S vessel.

2314 hours - In position 45°28'N, 01°38'E fired 2 torpedoes set to 4 feet. Range was 1200 yards. The first torpedo was seen to miss ahead. The second that was supposed to hit ran off track and missed astern. The enemy was now seen to be an armed tug. Gun action was ordered and hits were obtained quickly. 19 Rounds were fired for at least five hits. She was now left on fire fore and aft. She was also settling and down in the water. Tuna cleared the area to the South-West.

2 Jan 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 4th war patrol at Holy Loch.

29 Jan 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 5th war patrol. She was ordered to patrol of the Azores.

No logs are available for this period so no map of this patrol can be displayed.

16 Feb 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 5th war patrol at Gibraltar.

20 Feb 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Gibraltar for a convoy escort mission. She joins convoy HG 54.

5 Mar 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) leaves convoy HG 54 and proceeded to Holy Loch.

9 Mar 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) arrived at Holy Loch.

22 Mar 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 6th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

14 Apr 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 6th war patrol at Holy Loch.

30 Apr 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) is docked.

6 May 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) left dock.

1 Jun 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 7th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

20 Jun 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 7th war patrol at Holy Loch.

7 Jul 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 8th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

9 Jul 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) is attacked in error in position 49°16'N, 08°58'W by a British aircraft (217Sq./Y) resulting in some minor damage. Tuna was outside her area due to a small navigational error.

10 Jul 1941
While on patrol in the Bay of Biscay HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) fires two torpedoes at a submerged Asdic contact steering approximate course 191°, of what is thought to be an enemy submarine in position 46°00'N, 09°40'W. The torpedoes missed their target. No Axis submarines were however reported to be near that position at that date, so that attack was most likely against a non-sub target (if any).

(time zone unknown, not mentioned in patrol report and no log available)
10 July 1941
2208 hours - In position 46°00'N, 09°40'W the Port after lookout sighted through his glasses a periscope bearing Red 130°, distance 1000 yards. The Officer of the Watch turned hard to Starboard and dived. Tuna was in contact with the enemy submarine with Asdic while submerged.

2306 hours - Fired one torpedo at a contact 500 yards ahead. The torpedo was set to 32 feet. The torpedo missed and it was thought that the target had gone deep.

For the next two hours the target was hunted by Asdic.

11 July 1941
0114 hours - Fired one torpedo at the target that now was steady bearing 191°. Missed.

0115 hours - Surfaced and left the area full speed ahead.

19 Jul 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) fires 6 torpedoes at the German tanker Benno (8306 GRT, built 1939, former Norwegian Ole Jacob, offsite link) escorted by the German minesweepers M 18, M 25, M 27 and M 30 60 nautical miles north-west of the Gironde estuary in position 45°21'N, 02°23'W. Although six detonations were heard all torpedoes missed their target(s).

The Ole Jacob was captured on 10 November 1940 by the German armed merchant cruiser Atlantis in the Bay of Bengal in position 06°30'N, 90°13'E.

(time zone unknown, not mentioned in patrol report and no log available)
0048 hours - A darkened object was sighted and HE was heard bearing Green 04°.

0050 hours - Increased to full speed and closed. After about 10 minutes two destroyers could be distinguished ahead of the target. Shortly afterwards another destroyer was seen astern as well as another unidentified vessel.

In position in position 45°21'N, 02°23'W fired six torpedoes at the target from about 6000 yards.

0114 hours - Dived. Half a minute later a loud explosion was heard, followed shortly afterwards by another. Tuna went to 150 feet and rigged for depth charging but nothing further happened and Tuna surfaced about 1,5 hours after the attack and cleared the area.

29 Jul 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 8th war patrol at Holy Loch.

20 Aug 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) departed from Holy Loch for her 9th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

19 Sep 1941
HMS Tuna (Lt.Cdr. M.K. Cavenagh-Mainwaring, DSO, RN) ended her 9th war patrol at Holy Loch.

12 Nov 1941
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch for her 10th war patrol. She is to patrol off the Norwegian Coast.

No logs are available for this period so no map of this patrol can be displayed.

2 Dec 1941
HMS Tuna (Lt. M.B. St. John, RN) ended her 10th war patrol at Holy Loch.

13 Dec 1941
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch for her 11th war patrol. She was ordered to patrol off the Norwegian Coast. She is part of a special mission. For this she has to proceed to Scapa Flow first before departing for patrol from that base on 23 December. The special mission in question was part of Operation Archery, a commando raid on Vaagso. Tuna was to act as navigational beacon for the surface ships involved in this operation.

30 Dec 1941
HMS Tuna (Lt. M.B. St. John, RN) ended her 11th war patrol at Holy Loch.

14 Jan 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch for her 12th war patrol. She was ordered to patrol in the Bay of Biscay.

No logs are available for this period so no map of this patrol can be displayed.

18 Jan 1942
While on patrol in the Bay of Biscay HMS Tuna (Lt. M.B. St. John, RN) intercepts the French fishing vessel Juliette / Lorient 3476. The Skipper is taken on board for interrogation. Some of the papers are copied or confiscated.

21 Jan 1942
HMS Tuna (Lt. M.B. St. John, RN) ended her 12th war patrol at Falmouth. She departed from for Holy Loch later that same day.

23 Jan 1942
HMS Tuna (Lt. M.B. St. John, RN) arrived at Holy Loch.

6 Feb 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch for her 13th war patrol. She was ordered to patrol off the Norwegian Coast.

No logs are available for this period so no map of this patrol can be displayed.

25 Feb 1942
HMS Tuna (Lt. M.B. St. John, RN) ended her 13th war patrol at Lerwick.

27 Feb 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Lerwick bound for Holy Loch.

1 Mar 1942
HMS Tuna (Lt. M.B. St. John, RN) arrived at Holy Loch.

9 Mar 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch bound for Lerwick.

11 Mar 1942
HMS Tuna (Lt. M.B. St. John, RN) arrived at Lerwick.

16 Mar 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Lerwick for her 14th war patrol. She was ordered to patrol off the Norwegian Coast.

No logs are available for this period so no map of this patrol can be displayed.

3 Apr 1942
HMS Tuna (Lt. M.B. St. John, RN) ended her 14th war patrol at Lerwick. She departed from later that day for Holy Loch.

5 Apr 1942
HMS Tuna (Lt. M.B. St. John, RN) arrived at Holy Loch.

7 Apr 1942
HMS Tuna (Lt. M.B. St. John, RN) departed from Holy Loch for Blyth. She is to refit at the yard of Swan Hunters at Wallsend. This refit starts on 2 May 1942.

14 Sep 1942
With her refit completed HMS Tuna (Lt. R.P. Raikes, RN) departed from Blyth for Holy Loch to start the work-up period for her 2nd commission.

19 Sep 1942
HMS Tuna (Lt. R.P. Raikes, RN) arrived at Holy Loch for her work-up period along the Scottish West coast.

23 Oct 1942
HMS Tuna (Lt. R.P. Raikes, RN) departed from Holy Loch for her 15th war patrol. This is the first patrol of her 2nd commission and therefore a work-up patrol off the Norwegian Coast (to intercept the German heavy cruiser Admiral Scheer that is on passage from Northern Norway to Germany) and in the Norwegian Sea (to give cover for the passage of 36 merchant ships to and from Murmansk).

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 15th war patrolclick here for bigger map

25 Oct 1942
HMS Tuna (Lt. R.P. Raikes, RN) makes a short call at Lerwick before proceeding on patrol.

6 Nov 1942
HMS Tuna (Lt. R.P. Raikes, RN) fires two salvoes of three torpedoes each against German U-boat U-625 in position 76°08'N, 14°05'E. Both salvoes missed their target.

(All times are zone -1)
0154 hours - Sighted a German U-boat bearing 120°. Turned towards and started attack.

0204 hours - Fired three torpedoes but the enemy was seen to increase speed so at ......

0206 hours - Fired three more torpedoes but now the enemy changed course so all torpedoes fired missed their target.

Dived so not giving the enemy the opportunity for a counter attack.

Note: the attacks were not noted by the Germans.

16 Nov 1942
HMS Tuna (Lt. R.P. Raikes, RN) ended her 15th war patrol at Lerwick.

17 Nov 1942
HMS Tuna (Lt. R.P. Raikes, RN) departed from Lerwick for Holy Loch.

19 Nov 1942
HMS Tuna (Lt. R.P. Raikes, RN) arrived at Holy Loch.

30 Nov 1942
HMS Tuna (Lt. R.P. Raikes, RN) departed from Holy Loch for her 16th war patrol. She is to perform a special operation in the Bay of Biscay. Before she departed from for patrol exercises were carried out in Inchmarnock Water.

For the daily positions of HMS Tuna during this patrol see the map below.


HMS Tuna 16th war patrolclick here for bigger map

7 Dec 1942
During the evening of 7 December 1942 HMS Tuna (Lt. R.P. Raikes, RN) delivered the "Cockleshell Heroes" to the mouth of the Gironde for their daring raid on Bordeaux, France in which 6 German ships were mined. The raid was called Operation Frankton, and only two of the 12 men returned. (1)

13 Dec 1942
HMS Tuna (Lt. R.P. Raikes, RN) ended her 16th war patrol at Plymouth. She is to be refitted at Devonport Dockyard including the fitting of radar.

26 Jan 1943
HMS Tuna (Lt. R.P. Raikes, RN) departed from Plymouth for Holy Loch.

29 Jan 1943
HMS Tuna (Lt. R.P. Raikes, RN) arrived at Holy Loch.

25 Feb 1943
HMS Tuna (Lt. R.P. Raikes, RN) departed from Holy Loch for her 17th war patrol. She was ordered to patrol off the Norwegian Coast.

For the daily positions of HMS Tuna during this patrol see the map below.


HMS Tuna 17th war patrolclick here for bigger map

12 Mar 1943
HMS Tuna (Lt. R.P. Raikes, RN) ended her 17th war patrol at Lerwick.

13 Mar 1943
HMS Tuna (Lt. R.P. Raikes, RN) departed from Lerwick bound for Holy Loch.

14 Mar 1943
HMS Tuna (Lt. R.P. Raikes, RN) arrived at Holy Loch.

1 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) departed from Holy Loch for her 18th war patrol. She was ordered to patrol in the Norwegian Sea.

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 18th war patrolclick here for bigger map

3 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) makes a short call at Lerwick before proceeding on patrol.

7 Apr 1943
German U-boat U-644 was sunk in the North Sea north-west of Narvik, Norway, in position 69°38'N, 05°40'W, by torpedoes from the British submarine HMS Tuna (Lt. D.S.R. Martin, RN).

(All times are zone -2)
2103 hours - In position 69°38'N, 05°40'W heard diesel HE bearing 190°. Commenced attack.

2105 hours - Sighted German u-boat, enemy course 280°, speed 11 knots, range 500 yards.

2109 hours - Fired five torpedoes (six were ordered but one failed to leave the tube).

2109.50 hours - Heard one explosion.

2109.57 hours - Heard another explosion, HE ceased and breaking up noises were heard.

2119 hours - Heard three loud explosions, these must have been the remaining torpedoes exploding at the end of their run.

2123 hours - Surfaced amid wreckage and oil fuel. Also two dead bodies were sighted. One swimming survivor was also sighted but he drowned and sunk before he could be picked up.

14 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) attacks German U-boat U-302 with 4 torpedoes south of Jan Mayen Island in position 70°33'N, 07°10'W. The torpedoes however miss their target.

(All times are zone -2)
0702 hours - Heard diesel HE bearing 315°.

0705 hours - Observed the conning tower of a U-boat bearing 324°. Range was 9000 yards.

0731 hours - Fired 8 torpedoes from 5000 yards. All torpedoes missed their target.

19 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) ended her 18th war patrol at Lerwick. She departed from later that day for Holy Loch.

21 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) arrived at Holy Loch.

14 May 1943
HMS Tuna (Lt. D.S.R. Martin, RN) departed from Holy Loch for her 19th war patrol. She was ordered to patrol in the Norwegian Sea.

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 19th war patrolclick here for bigger map

30 May 1943
HMS Tuna (Lt. D.S.R. Martin, RN) attacks German U-boat U-341 with 8 torpedoes in the Norwegian Sea in position 64°17'N, 00°43'E. All torpedoes fired missed their target despite the fact that Lt. Martin claims a sinking.

(All times are zone -2)
1411 hours - Observed the conning tower of a submarine bearing 008°. Range was about 9000 yards. Started attack.

1442 hours - Fired 8 torpedoes from 8000 yards.

1451 hours - Just after the first explosion was heard the stern of the enemy submarine was seen to be enveloped in thick black smoke. She was seen to sink stern first at an angle of about 10°.

Note: The target was not hit.

3 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) ended her 19th war patrol at Lerwick.

4 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) departed from Lerwick for Holy Loch.

6 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) arrived at Holy Loch.

23 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) departed from Holy Loch for exercises with aircraft off the West coast of Scotland.

28 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) returns to Holy Loch.

2 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) is docked at Holy Loch.

5 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) left dock.

10 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) departed from Holy Loch for her 20th war patrol. She was ordered to patrol in the North Atlantic North of the Azores.

For the daily positions of HMS Tuna during this patrol see the map below.


HMS Tuna 20th war patrolclick here for bigger map

23 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) ended her 20th war patrol at Holy Loch.

15 Aug 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) departed from Holy Loch for her 21th war patrol. She was ordered to patrol in the Bay of Biscay.

For the daily and attack positions of HMS Tuna during this patrol see the map below.


HMS Tuna 21st war patrolclick here for bigger map

22 Aug 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) makes a torpedo attack on a German U-boat in position 47°18'N, 04°26'W. All torpedoes fired missed their target despite the claim of a sinking.

(All times are zone -1)
1147 hours - Sighted masts and upper works of five minesweepers bearing 200°. Distance 5 nautical miles, course 025°. As there were no A/S transmissions it was thought that these minesweepers were no escorts but were sweeping. Inside this screen of sweeping minesweepers 2 U-boats were present. Started attack.

1206 hours - Fired 8 torpedoes at one of the u-boats from 3000 yards. It was first intended to fire at both u-boats but the closest one was now much too close to be firing at. Upon firing Tuna went to 150 feet. However no counter attack followed.

1208 hours - One small explosion heard overhead.

1209 hours - Two torpedo explosions were heard, these are thought to be hits as HE of the target ceased.

Upon coming to periscope depth at 2000 hours it was discovered that Tuna had caught a paravane of one of the minesweepers. This was removed and the damage caused by it was repaired.

Note despite the claim for a sinking this was not the case. The u-boats attacked were most likely U-505 and U-515. Both had left Lorient at 2200 hours the previous day but returned at 1840 hours on the 22nd after U-505 had developed a fuel leak.

25 Aug 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) ended her 21th war patrol at Holy Loch. This was Tuna's last patrol. As new construction was now available in numbers Tuna was assigned to training duties. Tuna had troubles with her engines from the start, this was most likely also the reason for her being based in home waters for her entire career.

16 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) departed from Holy Loch to proceed to Scapa Flow. Here she will be used for A/S exercises.

18 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) arrived at Scapa Flow.

30 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) departed from Scapa Flow bound for Holy Loch.

2 Oct 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) arrived at Holy Loch.

15 Oct 1943
HMS Tuna (Lt.Cdr.(retired) J.R.G. Harvey, RN) departed from Holy Loch to proceed to Scapa Flow. Here she will be used for A/S exercises.

17 Oct 1943
HMS Tuna (Lt.Cdr.(retired) J.R.G. Harvey, RN) arrived at Scapa Flow.

31 Oct 1943
HMS Tuna (Lt.Cdr.(retired) J.R.G. Harvey, RN) departed from Scapa Flow bound for Blyth.

2 Nov 1943
HMS Tuna (Lt.Cdr.(retired) J.R.G. Harvey, RN) arrived at Blyth. She is to refit at the yard of Swan Hunters at Wallsend. This refit starts on 5 November 1943.

27 Apr 1944
HMS Tuna (Lt. L.F.L. Hill, RNR) ended her refit at Wallsend and proceeded to Blyth. Tuna is assigned to training duties mostly based at Holy Loch and Port H.H.Z. Tuna is also used for training with Chariot human torpedoes.

Media links


The T-class Submarine

Kemp, Paul J.

Sources

  1. Personal communication

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