The British T-class submarine HMS Tudor, sister ship of HMS Tarpon.
History
United Kingdom
Builder	Scotts, Greenock
Laid down	5 October 1937
Launched	17 October 1939
Commissioned	8 March 1940
Identification	Pennant number N17
Fate	Sunk 14 April 1940[1]
Badge
General characteristics
Class and type	British T class submarine
Displacement	1,090 tons surfaced 1,575 tons submerged
Length	275 ft (84 m)
Beam	26 ft 6 in (8.08 m)
Draught	16.3 ft (5.0 m)
Propulsion	Two shafts Twin diesel engines 2,500 hp (1.86 MW) each Twin electric motors 1,450 hp (1.08 MW) each
Speed	15.25 knots (28.7 km/h) surfaced 9 knots (20 km/h) submerged
Range	4,500 nautical miles at 11 knots (8,330 km at 20 km/h) surfaced
Test depth	300 ft (91 m) max
Complement	59
Armament	6 internal forward-facing 21-inch (533 mm) torpedo tubes 4 external forward-facing torpedo tubes 6 reload torpedoes 1 x 4-inch (102 mm) deck gun

The second HMS Tarpon (N17) was a T-class submarine of the Royal Navy. She was laid down by Scotts, Greenock and launched in October 1939. She is named after the large fish Tarpon; one species of which is native to the Atlantic, and the other to the Indo-Pacific Oceans.^[2]

Career

Tarpon had a short career, serving in the North Sea. She left Portsmouth on 5 April 1940 for Rosyth in company with HMS Severn. The following day they were ordered to Norway. On the 10th Tarpon was ordered to take up a new position. Tarpon was never heard from again.

It is asserted that there is a combination of British and German records which state that she was engaged by Schiff 40.^[3] The records show that Tarpon had attacked the Q-ship Schiff 40/Schürbek, but her first torpedoes had missed. The Q-ship picked up the Tarpon on her sonar and her periscope was sighted. The ship dropped numerous depth charges in a sustained counterattack that went on most of the morning. Finally a pattern of depth charges brought wreckage to the surface. The Q-ship remained on the scene until 0500 the next morning when it became clear the submarine had been sunk. Tarpon was reported overdue on 22 April 1940.^[4][5]

Wreck

The wreck was found and identified in the Danish part of the North Sea, near the harbour town of Thyborøn, by a Danish commercial diver, Gert Normann Andersen of the company JD-Contractor and British marine archaeologist Dr Innes McCartney in March 2016.^[6][7] The wreck was explored in a live TV program by Denmark's Radio on 28 August 2016.^[8] The submarine wreck was found with two torpedo tubes empty; confirming it likely they were fired in battle before her sinking. It is therefore still most likely she was then sunk by depth charges.^[3] The wreck is submerged in 40 metres of water.^[3]