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KM U-431
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| Technical Details| Class | VIIC | | Displacement | 1070 BRT | | Length o.a. | 220 ft 1 in (67.10 m) | | Beam | 6.20 m (6.20 m) | | Draught | variable (variable) | | Propulsion | Diesel-Electric | | Cruise Speed | 10 kn surf. | | Max. Speed | 17.7 kn surf. | | Armament/Other | 4 bow tubes, 1 stern tube, 14 torpedos or 26 TMA, deck gun 8.8 cm
Max depth 220m, 722ft | | Crew | 44-52 |
| History
U-431 was built as a type VIIC submarine in 1940. She was commissioned by Kptlt. Wilhelm Dommes.
She left Kiel on 19 Jun 1941 for transfer to Horten.
U-431 left Horten on 25 Jun 1941 for transfer to Trondheim.
She left Trondheim on 10 Jul 1941 for a war patrol of 33 days in sea. She returned 11 Aug 1941 to St. Nazaire.
No ships were sunk or damaged on this patrol.
U-431 left St. Nazaire on 13 Sep 1941 for a war patrol of 30 days in sea. She returned 12 Oct 1941 to St. Nazaire.
3,198 tons were sunk or damaged on this patrol.
She left St. Nazaire on 16 Nov 1941 for a war patrol of 35 days in sea. She returned 20 Dec 1941 to La Spezia.
A total of 3,560 tons were sunk or damaged on this patrol.
U-431 left La Spezia on 18 Jan 1942 for transfer to Messina.
She left Messina on 25 Jan 1942 for a war patrol of 17 days in sea. She returned 10 Feb 1942 to La Spezia.
A total of 313 tons were sunk or damaged on this patrol.
She left La Spezia on 18 Mar 1942 for a war patrol of 29 days in sea. She returned 15 Apr 1942 to La Spezia.
No ships were sunk or damaged on this patrol.
U-431 left La Spezia on 14 May 1942 for a war patrol of 17 days in sea. She returned 30 May 1942 to Salamis.
A total of 4,216 tons were sunk or damaged on this patrol.
She left Salamis on 4 Jun 1942 for a war patrol of 17 days in sea. She returned 20 Jun 1942 to La Spezia.
A total of 450 tons were sunk or damaged on this patrol.
U-431 left La Spezia on 2 Sep 1942 for a war patrol of 26 days in sea. She returned 27 Sep 1942 to La Spezia.
No ships were sunk or damaged on this patrol.
U-431 left La Spezia on 29 Sep 1942 for a war patrol of 37 days in sea. She returned 4 Nov 1942 to La Spezia.
Despite the effort, U-431 remained successless also on this patrol.
She left La Spezia on 7 Nov 1942 for a war patrol of 16 days in sea. She returned 22 Nov 1942 to Pola.
3,548 tons were sunk or damaged on this patrol.
U-431 left Pola on 7 Jan 1943 for a war patrol of 33 days in sea. She returned 8 Feb 1943 to Pola.
A total of 265 tons were sunk or damaged on this patrol.
She left Pola on 11 Mar 1943 for a war patrol of 19 days in sea. She returned 29 Mar 1943 to Toulon.
A total of 6,415 tons were sunk or damaged on this patrol.
U-431 left Toulon on 20 May 1943 for a war patrol of 10 days in sea. She returned 29 May 1943 to Toulon.
No ships were sunk or damaged on this patrol.
She left Toulon on 5 Jun 1943 for a war patrol of 23 days in sea. She returned 27 Jun 1943 to Toulon.
Despite the effort, U-431 remained successless also on this patrol.
She left Toulon on 9 Aug 1943 for a war patrol of 24 days in sea. She returned 1 Sep 1943 to Toulon.
U-431 was once more without luck on this patrol. no ship were damaged or sunk.
U-431 left Toulon on 26 Sep 1943 for what should become her last war patrol. After 21 Oct 1943, no further radio signals were received from U-431. Despite the effort, U-431 remained successless also on this patrol.
| Commandants/Captains
Kptlt. Wilhelm Dommes (5 Apr 1941 - 6 Jan 1943)
Oblt. Dietrich Schöneboom (15 Dec 1942 - 21 Oct 1943)
| Fate
Sunk on 21 Oct, 1943 in the Mediterranean out of Algiers in position 37.23N, 00.35E, by depth charges from a British Wellington aircraft (Sqdn. 179/Z). 52 dead (all hands lost). (FDS/NHB, November 1987).
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