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On This Day - April 23

18901891 - 1920: St GeorgeLaid down
1914E11Launched
1914E15Launched
1918C1Filled with dynamite and scheduled to be blown up at Zeebrugge Mole but was spared
1940Tetrarch (N77)18:30 Sighted a Southbound enemy convoy bearing 270, distance about 5 nautical miles. The convoy was made up of a large merchant vessel and three escorts. They are described as destroyers in the patrol report but they were not destroyers. The vessels were Ahrensburg on passage from Larvik to Fredrikshaven according to Rowher, escorted by T153, T155, F5, F8 and the minesweepers R33, R37 and R40

18:33 Tetrarch fired two torpedoes, range 4,000 yards, flat calm. Went deep and retired at high speed.

1837: Returned to periscope depth. Three escorting destroyers were seen approaching down the torpedo tracks a high speed. One of the destroyers was only 1500 yards away. Tetrarch went to 300 feet at full speed. Trim lost. Mills temporarily lost control and the boat dived to 400'

At 20:00 hours A/S trawlers joined in the hunt for Tetrarch

22:22 Surfaced, sighted two trawlers 1,000 yards away bearing down fast. Two torpedoes were fired. One one torpedo hit the UB boat. German sources indicate just three survivors.

Tetrarch was kept down at night and was therefore unable to charge batteries. Tetrarch eventually surfaced at 2130 hours on 24 April 1940 and set course back to Rosyth
1943Sickle (P224)HMS Sickle fires two torpedoes against the Italian merchant Mauro Croce off Sagunto, Spain. The torpedoes ran under the target and Sickle fired 19 rounds with her deck gun but failed to hit the target.
1943Syrtis (P241)Completed
1943Vagabond (P18)Laid Down
1945Seneschal (P255)Launched
2014Vigilant (S30)HMS Vigilant returned from patrol to her home on the Clyde

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