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Submarine HMS H 28 (N 28)

20 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. A.C.G. Mars, RN) shifted from Oban to Tobermory. (1)

21 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

22 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

23 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

26 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

27 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

28 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

29 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (1)

30 Apr 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) proceeded from Tobermory to Oban for fuel and fresh water. (1)

1 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) shifted from Oban to Tobermory. (2)

2 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

3 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

4 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

5 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

7 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

8 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

9 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

10 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) shifted from Tobermory to Oban. She was escorted by HMS L' Atlantique (Skr. A. McKay, RNR). (2)

11 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) shifted from Oban to Tobermory. She was escorted by HMS L' Atlantique (Skr. A. McKay, RNR). (2)

12 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

13 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

14 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

17 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

18 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

19 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

20 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Tobermory. (2)

21 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) shifted from Tobermory to Oban. She was escorted by HMS Spindrift. (2)

22 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) shifted from Oban to Tobermory. She was escorted by HMS Spindrift. (2)

23 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) departed Tobermory for Rothesay. She was escorted by HMS Tarantella (T/Lt. the Hon. R.A. Balfour, RNVR). (2)

24 May 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) arrived at Rothesay. (2)

29 May 1941
HMS H 28 (Lt. D.S.R. Martin, RN) conducted torpedo firing exercises and night exercises in the Clyde area with HMS Breda (Capt.(Retd.) A. E. Johnston, RN). (2)

1 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) proceeded from Rothesay to Campbeltown. (3)

2 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (3)

3 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (3)

4 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (3)

5 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (3)

6 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. Upon completion of these exercises she proceeded to Rothesay. (3)

9 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises in the Clyde area. (3)

11 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area for the C.O.Q.C. (Commanding Officers Qualifying Course). (3)

14 Jun 1941
HMS H 28 (Lt. D.S.R. Martin, RN) departed Rothesay for Londonderry. She was escorted by HMS Northern Dawn (Lt. J.O. Williams, RNR). (3)

15 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) arrived at Londonderry. (3)

17 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Lough Foyle. (3)

18 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Lough Foyle. (3)

19 Jun 1941 (position 0.00, 0.00)
HMS H 28 (Lt. D.S.R. Martin, RN) participated in A/S exercises off Lough Foyle. (3)

Submarine HMS Una (N 87)

8 Oct 1941
HMS Una (Lt. D.S.R. Martin, RN) departed her builders yard at Chatham for Sheerness where she arrived later the same day. (4)

9 Oct 1941
HMS Una (Lt. D.S.R. Martin, RN) conducted trials of Sheerness. (4)

10 Oct 1941
HMS Una (Lt. D.S.R. Martin, RN) departed Sheerness for Holy Loch. She was escorted by HMS Cottesmore (Lt.Cdr. J.C.A. Ingram, RN) towards Dungeness.

From Dungeness she proceeded unescorted to Lizard Head where she joined HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN) for onward passage to Holy Loch. (4)

15 Oct 1941
HMS Una (Lt. D.S.R. Martin, RN) arrived at Holy Loch for a period of trials and training. (4)

17 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted independent exercises in Lower Loch Long. (4)

18 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted independent exercises in the Clyde area. (4)

19 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted independent exercises in the Clyde area. (4)

21 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) shifted from Holy Loch to Arrochar. (4)

22 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted torpedo discharge trials off Arrochar. (4)

23 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted torpedo discharge trials off Arrochar. (4)

24 Oct 1941 (position 0.00, 0.00)
Having completed her torpedo discharge trials, HMS Una (Lt. D.S.R. Martin, RN), shifted from Arrochar to Holy Loch. (4)

26 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted noise trials in Lower Loch Long. (4)

29 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted practice attacks in the Clyde area with HMS Breda (Capt.(Retd.) A.E. Johnston, RN) as target. These included night exercises. (4)

30 Oct 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted practice attacks in the Clyde area with HMS Breda (Capt.(Retd.) A.E. Johnston, RN) as target. (4)

1 Nov 1941 (position 0.00, 0.00)
HMS Una (Lt. D.S.R. Martin, RN) conducted degaussing trials in Loch Long. (4)

3 Nov 1941
HMS Una (Lt. D.S.R. Martin, RN) departed Holy Loch for her 1st war patrol. She was ordered to patrol in the Bay of Biscay.

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

(5)

7 Nov 1941
In the evening, a signal from Flag Officer (S) (1339A/7) was received indicating the presence of a U-boat and HMS Una (Lt. D.S.R. Martin, RN) steered to intercept in 47°10'N, 06°00'W. Nothing was seen. (5)

10 Nov 1941
At 0001 hours HMS Una (Lt. D.S.R. Martin, RN) proceeded to intercept in 45°45'N 04°23'W a U-boat reported by Flag Officer(S) 1711A . The area was reached at 0610 hours but again nothing was seen. (5)

18 Nov 1941
At 0740 hours HMS Una (Lt. D.S.R. Martin, RN) made rendez-vous off Trevose Head with HMS White Bear (Cdr.(Retd.) C.C. Flemming, RN). (5)

19 Nov 1941
HMS Una (Lt. D.S.R. Martin, RN) ended her 1st war patrol at Rothesay. (5)

5 Dec 1941
HMS Una (Lt. D.S.R. Martin, RN) departed Holy Loch for her 2nd war patrol. She was ordered to patrol in the Bay of Biscay and to proceed to Gibraltar upon completion of the patrol to join the 10th Submarine Flotilla at Malta.

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

(6)

15 Dec 1941 (position 42.55, -10.31)
At 1111 hrs, a torpedo track was seen in position 42°55'N, 10°31'W but this attack was apparently bogus. However following a B-Dienst intercept of 10 December that the submarine HMS Regent (Lt. W.N.R. Knox, DSC, RN) was to pass through German naval grid BF 7795 (or 43°03'N, 10°30'W, which was remarkably close to the 'attack'), Admiral Doenitz ordered U-105 and U-332 to intercept but they did not observe any submarine and did not carry out any attack. (6)

19 Dec 1941
HMS Una (Lt. D.S.R. Martin, RN) ended her 2nd war patrol at Gibraltar. (6)

26 Dec 1941
HMS Una (Lt. D.S.R. Martin, RN) departed Gibraltar for Malta.

For the daily positions of HMS Una during this passage see the map below.

(7)

3 Jan 1942
HMS Una (Lt. D.S.R. Martin, RN) arrived at Malta. (7)

11 Jan 1942
HMS Una (Lt. D.S.R. Martin, RN) departed Malta for her 3rd war patrol (1st in the Mediterranean). She was ordered to patrol off the Gulf of Hammamet.

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

(8)

13 Jan 1942
HMS Una (Lt. D.S.R. Martin, RN) was ordered to leave her patrol area and to proceed to a new patrol area in the Gulf of Taranto to provide cover for two convoy's from Alexandria to Malta. At 1330 hours, she was informed of a convoy of six merchant vessels and three destroyers off Kurka Bank and proceed to intercept but nothing was seen. (8)

20 Jan 1942 (position 39.27, 17.22)
From 1400 hours, in position 39°27'N, 17°22'E, HMS Una (Lt. D.S.R. Martin, RN) stalked an A/S schooner for two and a half hours before giving up any attempt for an attack. (8)

23 Jan 1942
HMS Una (Lt. D.S.R. Martin, RN) ended her 3rd war patrol (1st in the Mediterranean) at Malta. (8)

9 Feb 1942
HMS Una (Lt. D.S.R. Martin, RN) departed Malta for her 4th war patrol (2nd in the Mediterranean). She was ordered to patrol off the Gulf of Taranto.

No log is available for this period and also the patrol report does not mention daily positions so no map can be displayed. (8)

12 Feb 1942 (position 39.20, 17.25)
HMS Una (Lt. D.S.R. Martin, RN) torpedoed and sank the Italian tanker Lucania (8106 GRT, built 1902) about 20 nautical miles north-east of Crotone, Calabria, Italy in position 39°20'N, 17°25'E.

This was most regrettable as Lucania had obtained a safe conduct from the British government as she was carrying Italian nationals from Eritrea and should not have been molested. The Italians were understandably quite angry and initiated an intense A/S search which resulted in the sinking of HMS Tempest (Lt.Cdr. W.A.K.N. Cavaye, RN). At the time Lt. Martin had developed pneumonia and had a 104°F (40° C) temperature and did not realise the mistake he had made.

(All times are zone -2)
1440 hours - Sighted a large Southbound tanker in ballast. Started attack.

1513 hours - In position 39°20'N, 17°25'E fired three torpedoes from 2000 yards and obtained one hit. The tanker was seen to catch fire and was abandoned by the crew. (8)

13 Feb 1942
Lt. Martin developed an ever higher temperature and the patrol had to be abandoned and course was set towards Malta. (8)

16 Feb 1942
HMS Una (Lt. D.S.R. Martin, RN) ended her 4th war patrol (2nd in the Mediterranean) at Malta. (8)

16 Feb 1942
HMS Una (Lt. C.P. Norman, RN) had barely been in harbour for a few hours when she sailed again from Malta for her 5th war patrol (3rd in the Mediterranean). She was ordered to form a patrol line with HMS P 34 (Lt. P.R.H. Harrison, DSC, RN) and HMS P 39 (Lt. N. Marriott, DSC, RN) in the eastern approaches of Tripoli, to intercept an important convoy.

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

(8)

Submarine HMS Ultimatum (P 34)

16 Nov 1942
P 34 (Lt. D.S.R. Martin, RN) departed Portsmouth for Plymouth where she was to refit at the Devonport Dockyard. (9)

17 Nov 1942
P 34 (Lt. D.S.R. Martin, RN) arrived at Plymouth. As she could not be accepted for refit immediately she first participated for several days in special RDF trials. (9)

Submarine HMS Seadog (P 216)

8 Dec 1942
HMS P 216 (Lt. D.S.R. Martin, RN) is taken in hand at Ardrossan for repairs and the change of a propeller (she was docked on the 14th). (10)

24 Dec 1942
HMS P 216 (Lt. D.S.R. Martin, RN) arrived at Lerwick. She departed for her 2nd war patrol later the same day. She was to patrol off Alten Fjord, Northern Norway to provide cover for convoys JW 51 / RA 51.

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

(11)

5 Jan 1943
While on the return passage to Lerwick HMS P 216 (Lt. D.S.R. Martin, RN) is ordered to take up a patrol position off the entrance to Vest Fjord. (11)

10 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) is ordered to leave her patrol position and return to Lerwick. (11)

11 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) is ordered to take up a patrol position off the Norwegian coast between Bredsund and Griphølen. (11)

13 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) again is ordered to leave her patrol position and return to Lerwick. (11)

15 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) ended her 2nd war patrol at Lerwick. (11)

23 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) departed Lerwick for her 3rd war patrol. She was ordered to patrol off Kristiansund, Norway to intercept German main units.

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

(11)

26 Jan 1943
HMS P 216 (Lt. D.S.R. Martin, RN) is ordered to patrol off Alten Fjord, Northern Norway during passage of convoys JW 52 / RA 52. (11)

8 Feb 1943
HMS P 216 (Lt. D.S.R. Martin, RN) ended her 3rd war patrol at Lerwick. (11)

11 Feb 1943
HMS P 216 (Lt. D.S.R. Martin, RN) departed Lerwick for Holy Loch. She made the passage together with HMS P 314 (Lt.Cdr. E.A. Woodward, DSO and Bar, RN) and HMS P 53 (Lt. G.E. Hunt, RN). They were escorted by HMS Pennyworth (T/Lt. R.A. Mason, RNVR). (12)

14 Feb 1943
HMS P 216 (Lt. D.S.R. Martin, RN) arrived at Holy Loch. (10)

15 Feb 1943
HMS Seadog (Lt. D.S.R. Martin, RN) shifted to Ardrossan for docking, repairs, the fitting of RDF and the fitting of an Oerlikon gun. (10)

Submarine HMS Tuna (N 94)

22 Mar 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area. Upon completion of these exercises HMS Tuna proceeded to Campbeltown. (13)

23 Mar 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) shifted from Campbeltown to Holy Loch. (13)

25 Mar 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area. (13)

27 Mar 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) shifted from Holy Loch to Kames Bay where she was immediately docked in a floating dock. She was undocked later the same day and then immediately returned to Holy Loch. (13)

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.

She made the passage to Lerwick together with HMS Stubborn (Lt. A.A. Duff, RN) and HMS Universal (Lt. C. Gordon, RN). They were escorted by HMS Tadoussac (T/Lt. J.P. Davies, RNR).

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

(14)

3 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) makes a short call at Lerwick before proceeding on patrol. (14)

7 Apr 1943 (position 69.38, -5.40)
The German U-Boat U-644 was sunk in the Norwegian Sea south-east of Jan Mayen Island, 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)

14 Apr 1943 (position 70.33, -7.10)
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. (14)

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. She made the passage together with HMS Severn (Lt.Cdr. A.N.G. Campbell, RN). They were escorted by HMS Hayling. (T/Lt. G.B. Christie, RNR). (12)

21 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) arrived at Holy Loch. (15)

29 Apr 1943
HMS Tuna (Lt. D.S.R. Martin, RN) shifted from Holy Loch to Rosneath where she was immediately docked in a floating drydock for a propeller change. (15)

30 Apr 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) was undocked at immediately returned to Holy Loch. (15)

2 May 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area. HMS Tuna proceeded to Campbeltown on completion of these exercises. (16)

3 May 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (16)

4 May 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) participated in A/S exercises off Campbeltown. (16)

5 May 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area. HMS Tuna proceeded to Holy Loch on completion of these exercises. (16)

7 May 1943
HMS Tuna (Lt. D.S.R. Martin, RN) conducted A/S exercises in the Clyde area with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS Spaniel. (16)

10 May 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) conducted exercises in the Clyde area. HMS Tuna proceeded to Holy Loch on completion of these exercises. (16)

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.

She made the passage to Lerwick together with HMS Stubborn (Lt. A.A. Duff, RN) and HMS Seadog (Lt. C.R. Pelly, RN). They were escorted by HMS Bryony (T/Lt. T. Hand, RNR).

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

(14)

16 May 1943
HMS Tuna (Lt. D.S.R. Martin, RN) arrived at Lerwick. (14)

17 May 1943
HMS Tuna (Lt. D.S.R. Martin, RN) departed Lerwick for her patrol area. (14)

30 May 1943 (position 64.17, 0.43)
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. (14)

3 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) ended her 19th war patrol at Lerwick. (14)

4 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) departed from Lerwick for Holy Loch. She made the passage together with HMS Stubborn (Lt. A.A. Duff, RN) and HMS Ultimatum (Lt. W.H. Kett, DSC, RNR). They were escorted by HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN).

The next moring they were joined by HMS Syrtis (Lt M.H. Jupp, DSC, RN). (12)

6 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, RN) arrived at Holy Loch. (17)

17 Jun 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) conducted exercises in the Clyde area. On completion of these HMS Tuna proceeded to Larne. (17)

18 Jun 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) conducted exercises off Larne. (17)

19 Jun 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) departed Larne for exercises in the Clyde area. Upon completion of these exercises HMS Tuna proceeded to Holy Loch. (17)

21 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) conducted special A/S exercises inthe Clyde area with HMS Ambuscade (Lt.Cdr. D.E. Mansfield, RN). (17)

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. She was escorted by HMS Ambuscade (Lt.Cdr. D.E. Mansfield, RN) and HMS Kingfisher (Lt.Cdr.(Retd.) G.H. Gandy, RN). (12)

28 Jun 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) returns to Holy Loch. (17)

2 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) is docked in AFD 7 at Holy Loch. (18)

5 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) is undocked. (18)

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.

HMS Tuna, HMS Truculent (Lt.Cdr. R.L. Alexander, RN) and USS Haddo (Lt.Cdr. J. Corbus, USN) were escorted out by HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN).

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

(14)

23 Jul 1943
HMS Tuna (Lt. D.S.R. Martin, DSO, RN) ended her 20th war patrol at Holy Loch. Tuna, and HMS Truculent (Lt.Cdr. R.L. Alexander, RN) were escorted from 0800 hours by HMS Scimitar. (14)

8 Aug 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, RN) proceeded to Campbeltown on completion of the exercises. (16)

12 Aug 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted exercises in the Clyde area with HMS White Bear. These also included night exercises during the night of 12/13 August. (19)

14 Aug 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) shifted from Holy Loch to Larne. (19)

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.

Passage south through the Irish Sea was made together with HMS Truculent (Lt.Cdr. R.L. Alexander, DSO, RN). They were escorted until 0700/17 by HMS Loch Monteith (T/Lt. K.W. Richardson, RNR).

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

(14)

22 Aug 1943 (position 47.18, -4.26)
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. (14)

24 Aug 1943
At 1200 hours, HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN), made rendes-vous with HMS Truculent (Lt.Cdr. R.L. Alexander, DSO, RN) and their escort north towards Holy Loch, HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN). (14)

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 (as did other T-class boats built by Scotts), this was also the reason for her being based in home waters for her entire career. (14)

11 Sep 1943 (position 0.00, 0.00)
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) shifted from Holy Loch to Rothesay. (20)

12 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted exercises in the Clyde area for the C.O.Q.C. (Commanding Officers Qualifying Course) with HMS Breda (Capt.(Retd.) A.E. Johnston, RN), HMS Scimitar (Lt. G.C. Potter, DSC, RN), HMS Sardonyx (T/A/Lt.Cdr. E. Playne, RNVR) and HMS Blade (T/A/Lt.Cdr. S.T. Wenlock, RNR). (20)

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. During this passage she was escorted by HMS La Capricieuse (Lt.Cdr. G.W. Dobson, RNR). (20)

18 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) arrived at Scapa Flow. (20)

21 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted practice attacks off Scapa Flow on HMS Queen Elizabeth (Capt. H.G. Norman, CBE, RN) escorted by the destroyers HMS Musketeer (Cdr. E.N.V. Currey, DSC, RN), ORP Orkan (Cdr. S. Hryniewiecki, ORP) and HMCS Huron (Lt.Cdr. H.S. Rayner, DSC, RCN).

The battleship herself was meanwhile conducting gunnery exercises. In the evening she conducted a night encounter exercises during which the destroyer HMCS Iroquois (Cdr. J.C. Hibbard, DSC, RCN) served as target. (21)

22 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted A/S exercises off Scapa Flow together with HMS Venus (Cdr. J.S.M. Richardson DSO, RN) and HMIS Kistna (A/Cdr.(Emgy.) R.R. Caws, RIN). (20)

26 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted practice attacks during which HMS Viking (Lt. R. Bannar-Martin, DSC, RN) served as the target. (22)

28 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted practice attacks on HMS Renown (Capt. W.E. Parry, CB, RN) escorted by the destroyers HMS Janus (Lt.Cdr. W.B.R. Morrison, RN) and HMCS Iroquois (Cdr. J.C. Hibbard DSC, RCN). (20)

29 Sep 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) conducted practice attacks on USS Tuscaloosa (Capt. J.B.W. Waller, USN) and HMS Belfast (Capt. F.R. Parham, RN). (20)

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

She made the passage together with HMS Unswerving (T/Lt. M.D. Tattersall, RNVR) and HMS Stonehenge (Lt. D.S.M. Verschoyle-Campbell, DSC and Bar, RN). The submarines were escorted by the British minesweeper HMS La Capricieuse (Cdr. G.W. Dobson, RNR). (20)

2 Oct 1943
HMS Tuna (Lt. D.S.R. Martin, DSO and Bar, RN) arrived at Holy Loch. (23)

Submarine HMS Terrapin (P 323)

19 Jan 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed her builders yard at Barrow for Holy Loch. She was escorted by HNoMS Acanthus. (24)

20 Jan 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Holy Loch to begin a period of trials and training. (24)

22 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted speed runs onthe Arran measured mile. (24)

25 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted exercises in the Clyde area. (24)

26 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted exercises in the Clyde area. (24)

27 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted exercises in the Clyde area. (24)

28 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted exercises in the Clyde area. (24)

29 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) shifted from Holy Loch to Campbeltown. (24)

30 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) shifted from Campbeltown to Holy Loch. (24)

31 Jan 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted noise trials in Loch Goil. (24)

1 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted high speed runs on the measured mile in Loch Long. (25)

3 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) shifted from Holy Loch to Arrochar where she was to conduct her torpedo discharge trials. (25)

6 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

7 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

8 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

9 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

10 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

12 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

13 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted torpedo discharge trials off Arrochar. (25)

14 Feb 1944 (position 0.00, 0.00)
Having completed her torpedo discharge trial programme, HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN), shifted from Arrochar to Holy Loch. (25)

16 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) and HMS Tudor (Lt. S.A. Porter, DSC, RN) both conducted attack exercises in the Clyde area with HMS Jan van Gelder (Lt. P.D. O'Driscoll, RNR) serving as target. These exercises included night exercises. (25)

17 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) returned to Holy Loch on completion of last night exercises. (25)

18 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) and HMS Strongbow (Lt. J.A.R. Troup, DSC, RN) conducted attack exercises in the Clyde area with each other. (25)

22 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted underway refueling trials in the Clyde area. (25)

24 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted gunnery exercises in the Clyde area. (25)

26 Feb 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) and HMS Porpoise (Lt.Cdr. H.A.L. Marsham, OBE, RN) both conducted attack exercises in the Clyde area with HMS Bridgewater (Cdr.(Retd.) R.H. Mack, RN) and HMS Jan van Gelder (Lt. P.D. O'Driscoll, RNR) serving as targets. These exercises included night exercises. (26)

27 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) proceeded to Larne on completion of last night exercises. (25)

29 Feb 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with aircraft. (25)

2 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with HMS Clarkia (A/Lt.Cdr. J.O. Williams, RNR) and HMS Petunia (Lt. R.M. Roberts, RNR). (27)

3 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with with the 21st Escort Group and later only with HMS Exe (Cdr. C.E.E. Paterson, RN) and HMS Berkeley Castle (T/Lt. F.A. Darrah, RNVR). (27)

4 Mar 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with aircraft. (27)

5 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with aircraft. (27)

8 Mar 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with HMS Starling (Capt. F.W. Walker, CB, DSO and 2 Bars, RN) and HMS Whimbrel (Lt.Cdr. W.J. Moore, DSC, RNR). Following these A/S exercises a practice attack was made on HMS Starling. (27)

10 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with HMS Cooke (Lt.Cdr. L.C. Hill, OBE, RD, RNR), HMS Domett (T/A/Lt.Cdr. S. Gordon, RNVR), HMS Duckworth (Cdr. R.G. Mills, DSO, DSC and Bar, RN) and HMS Ekins (T/Lt. G.G. Bonner-Davies, RNVR). (27)

11 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted A/S exercises off Larne with HMS Cooke (Lt.Cdr. L.C. Hill, OBE, RD, RNR), HMS Duckworth (Cdr. R.G. Mills, DSO, DSC and Bar, RN) and HMS Ekins (T/Lt. G.G. Bonner-Davies, RNVR). (27)

12 Mar 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) shifted from Larne to Holy Loch. (27)

16 Mar 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Holy Loch for her 1st war patrol. She is to proceed with dispatch to Lerwick and then to patrol off Southern Norway. The British are under the impression that the German battleship Tirpitz will return to Germany for repairs.

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

(28)

17 Mar 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) toppes off with fuel at Lerwick. After this short stop she proceeds on patrol. (28)

24 Mar 1944 (position 58.09, 6.28)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) attacked a German convoy off Lista, Norway in position 58°09'N, 06°28'E and torpedoed and damaged the German catapult ship Schwabenland (8186 GRT, built 1925) and the German tanker Wörth (6256 GRT, former Dutch Omala, built 1938). The Schwabenland is grounded to prevent her from sinking and the Wörth is towed to port. Both ships were out of action for the remainder of the war.

(All times are zone -1)
1200 hours - Sighted two Arado float planes and several ME 109's patrolling to the Northwards. Prepared to attack to upcoming convoy.

1253 hours - Sighted that the convoy was made up of 2 columns, 6 ships in all. The first column was seen to be made up of 1 tanker of 5000 tons, 1 merchant of 4000 tons and one of 1000 tons. The second column was made up of a 3000 tons tanker and 2 1000 tons merchants. The escorts was made up of 2 M-class minesweepers ahead of each column with a trawler on each beam and another one astern, so 3 trawlers in all.

1312 hours - Fired 4 torpedoes at the leading ship of the Starboard column (the tanker type of 5000 tons).

1313 hours - Fired 2 torpedoes at the second ship in the Starboard column (the merchant of 4000 tons).

One hit was observed on the first target and another torpedo was also hit this target but could not be observed as Terrapin was spotted by one of the escorting minesweepers that started dropping depth charges. 33 Depth charges in all were dropped by the escorts but these did little damage. (28)

2 Apr 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) ended her 1st war patrol at Lerwick. (28)

6 Apr 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Lerwick for Holy Loch. She is escorted by HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN). (29)

9 Apr 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Holy Loch. (29)

28 Apr 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted sound trials in Loch Goil. (29)

30 Apr 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Holy Loch bound for Gibraltar. She is to proceed to the Far East. During the passage south through the Irish Sea she was escorted by HMS Bridgewater (Cdr.(Retd.) R.H. Mack, RN).

For the daily positions of HMS Terrapin during this passage see the map below.

(29)

11 May 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Gibraltar. (30)

15 May 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Gibraltar bound for Malta. (30)

20 May 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Malta. (30)

27 May 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Malta bound for Port Said. (30)

1 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Port Said. (31)

2 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) transits the Suez Canal. (31)

3 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Suez bound for Aden. (31)

10 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Aden. (31)

14 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Aden bound for Colombo. (31)

23 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Colombo. (31)

28 Jun 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) is docked at Colombo. (31)

11 Jul 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) left dock. (32)

14 Jul 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Colombo bound for Trincomalee. (32)

16 Jul 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) arrived at Trincomalee. (32)

21 Jul 1944 (position 0.00, 0.00)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) conducted exercises off Trincomalee. (32)

23 Jul 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) departed from Trincomalee for her 2nd war patrol. She was ordered to patrol off the West coast of Sumatra. She is also to perform a special operation.

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

(28)

30 Jul 1944 (position 1.00, 98.42)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) makes a torpedo attack on an escorted Japanese merchant vessel off the West coast of Sumatra, Netherlands East Indies in position 01°24'N, 98°42'E . Four torpedoed were fired but these all missed their target.

(All times are zone -6.5)
0825 hours - Sighted smoke bearing 174°.

0915 hours - In position 01°24'N, 98°42'E started an attack on a merchant vessel of about 1500 tons that was escorted by a modern looking ML.

0930 hours - Fired four torpedoes against the merchant vessel from 1000 yards. It appeared that the periscope was spotted as the target changed course and turned end on immediately after firing.

The ML hunted Terrapin for about half an hour but did not drop any depth charges. (28)

5 Aug 1944 (position 1.18, 97.36)
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) bombards the pier at Gunung Sitoli (Nias Island), western Sumatra. A Japanese coaster is sunk with gunfire another is either damaged or destroyed by fire.

(All times are zone -6.5)
1452 hours - Surfaced in position 01°18'N, 97°36'E for gun action. The targets were two coasters moored alongside Gunung Sitoli pier. Range was 2000 yards. 22 rounds were fired for 15 hits. The inside coaster was seen to be sinking, the other was on fire. As Trespasser was now taken under fire by a gun on the shore the action had to be broken off and she dived to safety. (28)

10 Aug 1944
During 10 and 11 August 1944 HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) performs a special operation. She is part of 'Operation Boomerang'. American B-29 bombers are dropping mines in Japanese occupied territory. Terrapin is to act as beacon for planes proceeding towards Palembang. If needed she is also to carry out air/sea rescue duties. No planes were lost during this raid. (28)

17 Aug 1944
HMS Terrapin (Lt.Cdr. D.S.R. Martin, DSO and 2 bars, RN) ended her 2nd war patrol (1st in the Far East) at Trincomalee. (28)

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