German submarine U-413

History
Nazi Germany
Name	U-413
Ordered	15 August 1940
Builder	Danziger Werft, Danzig
Yard number	114
Laid down	25 April 1941
Launched	15 January 1942
Commissioned	3 June 1942
Fate	Sunk on 20 August 1944 in the Cornish corridor, 15 miles off the coast near Padstow, by a naval mine. 45 dead and one survivor
General characteristics
Class and type	Type VIIC submarine
Displacement	769 tonnes (757 long tons) surfaced; 871 t (857 long tons) submerged;
Length	67.10 m (220 ft 2 in) o/a; 50.50 m (165 ft 8 in) pressure hull;
Beam	6.20 m (20 ft 4 in) o/a; 4.70 m (15 ft 5 in) pressure hull;
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels); 750 PS (550 kW; 740 shp) (electric);
Propulsion	2 shafts; 2 × diesel engines; 2 × electric motors;
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced; 7.6 knots (14.1 km/h; 8.7 mph) submerged;
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced; 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	230 m (750 ft); Crush depth: 250–295 m (820–968 ft);
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern); 14 × G7e torpedoes; 1 × 8.8 cm (3.46 in) deck gun (220 rounds); 1 × 2 cm (0.79 in) C/30 anti-aircraft guns;
Service record
Part of:	8th U-boat Flotilla; 3 June – 31 October 1942; 1st U-boat Flotilla; 1 November 1942 – 20 August 1944;
Identification codes:	M 03 918
Commanders:	Kptlt. Gustav Poel; 3 June 1942 – 19 April 1944; Oblt.z.S. Dietrich Sachse; 20 April – 20 August 1944;
Operations:	7 patrols:; 1st patrol:; a. 22 – 24 October 1942; b. 28 October – 25 November 1942; 2nd patrol:; 27 December 1942 – 17 February 1943; 3rd patrol:; 29 March – 13 June 1943; 4th patrol:; a. 4 – 5 September 1943; b. 8 – 18 September 1943; c. 27 – 28 September 1943; d. 2 October – 21 November 1943; 5th patrol:; 26 January – 27 March 1944 ; 6th patrol:; 6 – 9 June 1944 ; 7th patrol:; 2 – 20 August 1944;
Victories:	5 merchant ships sunk ; (36,885 GRT); 1 warship sunk ; (1,100 tons);

U-413 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.

She was laid down on 25 April 1941 at the Danziger Werft (as yard number 114), launched on 15 January 1942 and commissioned on 3 June, with Oberleutnant zur See Gustav Poel in command. Poel commanded her (receiving promotion to Kapitänleutnant), until 19 April 1944, when he was relieved by Oberleutnant zur See Dietrich Sachse who commanded her until her loss. She conducted seven patrols in World War II, sinking six ships totalling 36,885 gross register tons (GRT) and 1,100 tons.

Design[]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-413 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.^[2] She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).^[2]

The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph).^[2] When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-413 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and one 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.^[2]

Service history[]

First and second patrols[]

The U-boat departed Kiel on 22 October 1942, on her first patrol.

Warwick Castle in 1931

On 14 November 1942, she sank the 20,107 GRT troop transport ship MV Warwick Castle (one of the largest sunk in World War II).

At 08:44, the ship, under the command of Henry Richard Leepman-Shaw in was hit by one of two torpedoes fired, about 200 nautical miles (370 km; 230 mi) NW of Cape Espichel, Portugal. The U-boat hit her again at 08:57, causing the ship to sink about one hour later. The master, 61 crew members and 34 service personnel died. 201 crew members, 29 gunners and five naval and 131 service personnel were rescued by HMS Achates, HMS Vansittart, HMCS Louisburg, and the British . The latter ship had been in for Operation Torch (the invasion of North Africa).

On 19 November 1942, U-413 was attacked by a British Lockheed Hudson aircraft with five bombs and was damaged so severely that she had to return to a new base - Brest in occupied France.

Her second patrol was marked by sinking the American ship West Portal in mid-Atlantic on 5 February 1943; there were no survivors. She also attacked and sank the Greek Mount Mycale on 22 January 1943, northeast of Newfoundland.

Third and fourth patrols[]

Her third patrol saw her leave Brest on 29 March 1943, once more for the Atlantic. There, she sank the British vessel Wanstead south of Greenland, whose survivors were picked up by the corvette HMS Poppy and the ASW (anti-submarine warfare) .

Her fourth sortie was a frustrating one; it was split into three parts, but she failed to sink any ships.

Fifth and sixth patrols[]

On 20 February 1944, she sank the British 1,100 tons destroyer HMS Warwick about 15 miles off Trevose Head, north Cornwall. This was Poel's last patrol. He moved to the Naval Academy Mürwik in Flensburg.

Seventh patrol and sinking[]

Her last victory was when she sank Saint Enogat on 19 August 1944 in the English Channel.

U-413 did not suffer any casualties until 20 August 1944, when she was sunk, by one of the 115 strategically placed Naval Mines in the Cornish corridor 15 miles off the coast from Padstow. 45 of her crew were killed; there was one survivor.

The wreck of U-413 was located and identified by marine archaeologist Innes McCartney in 2000 close to the official sinking position.

Wolfpacks[]

U-413 took part in 15 wolfpacks, namely:

Westwall (8 – 19 November 1942)
Jaguar (10 – 31 January 1943)
Pfeil (1 – 9 February 1943)
Adler (11 – 13 April 1943)
Meise (13 – 27 April 1943)
Star (27 April – 4 May 1943)
Fink (4 – 6 May 1943)
Naab (12 – 15 May 1943)
Donau 2 (15 – 26 May 1943)
Schlieffen (14 – 22 October 1943)
Siegfried (22 – 27 October 1943)
Siegfried 2 (27 – 30 October 1943)
Körner (30 October – 2 November 1943)
Tirpitz 2 (2 – 8 November 1943)
Eisenhart 8 (9 – 11 November 1943)

Trivia[]

Neal Stephenson's novel Cryptonomicon features a fictitious U-413, a milchkuh (supply boat).

Summary of raiding history[]

Date	Ship Name	Nationality	Tonnage^{[Note 1]}	Fate^[3]
14 November 1942	Warwick Castle	United Kingdom	20,107	Sunk
22 January 1943	Mount Mycale	Greece	3,556	Sunk
5 February 1943	West Portal	United States	5,376	Sunk
21 April 1943	Wanstead	United Kingdom	5,486	Sunk
21 April 1944	HMS Warwick	Royal Navy	1,100	Sunk
19 August 1944	Saint Enogat	United Kingdom	2,360	Sunk

References[]

Notes[]

^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations[]

^ Kemp 1999, p. 212.
^ ^a ^b ^c ^d Gröner 1991, pp. 43–46.
^ Helgason, Guðmundur. "Ships hit U-413". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.

Bibliography[]

Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
Edwards, Bernard (1996). Dönitz and the Wolf Packs - The U-boats at War. Cassell Military Classics. p. 145. ISBN 0-304-35203-9.
Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
Innes McCartney (2002). Lost Patrols: Submarine Wrecks of the English Channel.
Kemp, Paul (1999). U-Boats Destroyed - German Submarine Losses in the World Wars. London: Arms & Armour. ISBN 1-85409-515-3.

External links[]

Helgason, Guðmundur. "The Type VIIC boat U-413". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.

Coordinates: Röll, p.282 50°21′N 00°01′W / 50.350°N 0.017°W / 50.350; -0.017

[tonnage-3] Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

[FOOTNOTEKemp1999212-1] Kemp 1999, p. 212.

[FOOTNOTEGröner199143–46-2] Gröner 1991, pp. 43–46.

[4] Helgason, Guðmundur. "Ships hit U-413". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.

[1]

[2]

[Note 1]

[3]

v t German Type VII submarines
Type VIIA	U-27 U-28 U-29 U-30 U-31 U-32 U-33 U-34 U-35 U-36
Type VIIB	U-45 U-46 U-47 U-48 U-49 U-50 U-51 U-52 U-53 U-54 U-55 U-73 U-74 U-75 U-76 U-83 U-84 U-85 U-86 U-87 U-99 U-100 U-101 U-102
Type VIIC	U-69 U-70 U-71 U-72 U-77 U-78 U-79 U-80 U-81 U-82 U-88 U-89 U-90 U-91 U-92 U-93 U-94 U-95 U-96 U-97 U-98 U-132 U-133 U-134 U-135 U-136 U-201 U-202 U-203 U-204 U-205 U-206 U-207 U-208 U-209 U-210 U-211 U-212 U-221 U-222 U-223 U-224 U-225 U-226 U-227 U-228 U-229 U-230 U-231 U-232 U-235 U-236 U-237 U-238 U-239 U-240 U-241 U-242 U-243 U-244 U-245 U-246 U-247 U-248 U-249 U-250 U-251 U-252 U-253 U-254 U-255 U-256 U-257 U-258 U-259 U-260 U-261 U-262 U-263 U-264 U-265 U-266 U-267 U-268 U-269 U-270 U-271 U-272 U-273 U-274 U-275 U-276 U-277 U-278 U-279 U-280 U-281 U-282 U-283 U-284 U-285 U-286 U-287 U-288 U-289 U-290 U-291 U-301 U-302 U-303 U-304 U-305 U-306 U-307 U-308 U-309 U-310 U-311 U-312 U-313 U-314 U-315 U-316 U-331 U-332 U-333 U-334 U-335 U-336 U-337 U-338 U-339 U-340 U-341 U-342 U-343 U-344 U-345 U-346 U-347 U-348 U-349 U-350 U-351 U-352 U-353 U-354 U-355 U-356 U-357 U-358 U-359 U-360 U-361 U-362 U-363 U-364 U-365 U-366 U-367 U-368 U-369 U-370 U-371 U-372 U-373 U-374 U-375 U-376 U-377 U-378 U-379 U-380 U-381 U-382 U-383 U-384 U-385 U-386 U-387 U-388 U-389 U-390 U-391 U-392 U-393 U-394 U-396 U-397 U-398 U-399 U-400 U-401 U-402 U-403 U-404 U-405 U-406 U-407 U-408 U-409 U-410 U-411 U-412 U-413 U-414 U-415 U-416 U-417 U-418 U-419 U-420 U-421 U-422 U-423 U-424 U-425 U-426 U-427 U-428 U-429 U-430 U-431 U-432 U-433 U-434 U-435 U-436 U-437 U-438 U-439 U-440 U-441 U-442 U-443 U-444 U-445 U-446 U-447 U-448 U-449 U-450 U-451 U-452 U-453 U-454 U-455 U-456 U-457 U-458 U-465 U-466 U-467 U-468 U-469 U-470 U-471 U-472 U-473 U-475 U-476 U-477 U-478 U-479 U-480 U-481 U-482 U-483 U-484 U-485 U-486 U-551 U-552 U-553 U-554 U-555 U-556 U-557 U-558 U-559 U-560 U-561 U-562 U-563 U-564 U-565 U-566 U-567 U-568 U-569 U-570 U-571 U-572 U-573 U-574 U-575 U-576 U-577 U-578 U-579 U-580 U-581 U-582 U-583 U-584 U-585 U-586 U-587 U-588 U-589 U-590 U-591 U-592 U-593 U-594 U-595 U-596 U-597 U-598 U-599 U-600 U-601 U-602 U-603 U-604 U-605 U-606 U-607 U-608 U-609 U-610 U-611 U-612 U-613 U-614 U-615 U-616 U-617 U-618 U-619 U-620 U-621 U-622 U-623 U-624 U-625 U-626 U-627 U-628 U-629 U-630 U-631 U-632 U-633 U-634 U-635 U-636 U-637 U-638 U-639 U-640 U-641 U-642 U-643 U-644 U-645 U-646 U-647 U-648 U-649 U-650 U-651 U-652 U-653 U-654 U-655 U-656 U-657 U-658 U-659 U-660 U-661 U-662 U-663 U-664 U-665 U-666 U-667 U-668 U-669 U-670 U-671 U-672 U-673 U-674 U-675 U-676 U-677 U-678 U-679 U-680 U-681 U-682 U-683 U-701 U-702 U-703 U-704 U-705 U-706 U-707 U-708 U-709 U-710 U-711 U-712 U-713 U-714 U-715 U-716 U-717 U-718 U-719 U-720 U-721 U-722 U-731 U-732 U-733 U-734 U-735 U-736 U-737 U-738 U-739 U-740 U-741 U-742 U-743 U-744 U-745 U-746 U-747 U-748 U-749 U-750 U-751 U-752 U-753 U-754 U-755 U-756 U-757 U-758 U-759 U-760 U-761 U-762 U-763 U-764 U-765 U-766 U-767 U-768 U-771 U-772 U-773 U-774 U-775 U-776 U-777 U-778 U-779 U-821 U-822 U-825 U-826 U-901 U-903 U-904 U-905 U-907 U-921 U-922 U-923 U-924 U-925 U-926 U-927 U-928 U-951 U-952 U-953 U-954 U-955 U-956 U-957 U-958 U-959 U-960 U-961 U-962 U-963 U-964 U-965 U-966 U-967 U-968 U-969 U-970 U-971 U-972 U-973 U-974 U-975 U-976 U-977 U-978 U-979 U-980 U-981 U-982 U-983 U-984 U-985 U-986 U-987 U-988 U-989 U-990 U-991 U-992 U-993 U-994 U-1051 U-1052 U-1053 U-1054 U-1055 U-1056 U-1057 U-1058 U-1101 U-1102 U-1131 U-1132 U-1161 U-1162 U-1191 U-1192 U-1193 U-1194 U-1195 U-1196 U-1197 U-1198 U-1199 U-1200 U-1201 U-1202 U-1203 U-1204 U-1205 U-1206 U-1207 U-1208 U-1209 U-1210
Type VIIC/41	U-292 U-293 U-294 U-295 U-296 U-297 U-298 U-299 U-300 U-317 U-318 U-319 U-320 U-321 U-322 U-323 U-324 U-325 U-326 U-327 U-328 U-691 U-827 U-828 U-929 U-930 U-995 U-997 U-998 U-999 U-1000 U-1001 U-1002 U-1003 U-1004 U-1005 U-1006 U-1007 U-1008 U-1009 U-1010 U-1011 U-1013 U-1014 U-1015 U-1016 U-1017 U-1018 U-1019 U-1020 U-1021 U-1022 U-1023 U-1024 U-1025 U-1063 U-1064 U-1065 U-1103 U-1104 U-1105 U-1106 U-1107 U-1108 U-1109 U-1110 U-1163 U-1164 U-1165 U-1166 U-1167 U-1168 U-1169 U-1170 U-1171 U-1172 U-1271 U-1272 U-1273 U-1274 U-1275 U-1276 U-1277 U-1278 U-1279 U-1301 U-1302 U-1303 U-1304 U-1305 U-1306 U-1307 U-1308
Type VIID	U-213 U-214 U-215 U-216 U-217 U-218
Type VIIF	U-1059 U-1060 U-1061 U-1062
Preceded by: Type II Followed by: Type IX List of U-boats of Germany

v t Shipwrecks and maritime incidents in August 1944
Shipwrecks	2 Aug: USS Fiske 3 Aug: HMS Quorn 4 Aug: Tannenfels, Matsu 5 Aug: Mefküre, U-671 6 Aug: Empire City, U-471, U-736, U-952, U-969, Sachsenwald 7 Aug: Amsterdam, Empire Day, Nagara 8 Aug: Conte Verde, HMCS Regina, Tama Maru No. 6 9 Aug: Spichern 10 Aug: U-608 11 Aug: U-385, U-967 12 Aug: T-114, T-118, U-198, U-981 13 Aug: USS Flier, Preußen, U-270 14 Aug: Gueydon, U-618 15 Aug: U-741 16 Aug: Trémintin 18 Aug: La Galissonnière, Natori, Strasbourg, Taiyō, Teia Maru', U-107, U-129, U-621 19 Aug: Commandant Teste, Hayasui, Tamatsu Maru, U-123, U-466 20 Aug: Richard Montgomery, U-9, U-413, U-984, U-1229 21 Aug: HMCS Alberni, HMS Kite, HMS Orchis, U-230, Z23 22 Aug: HMS Bickerton, HMS Loyalty, Matsuwa, Tsushima Maru, U-344 23 Aug: Asakaze, U-180 24 Aug: USS Harder, NMS Mihail Kogălniceanu, U-354, U-445, Z37 25 Aug: U-18, U-24, U-178, U-667, UIT-21, Yūnagi, Z24 26 Aug: Samidare, U-188 27 Aug: HMS Britomart, Clemenceau, HMS Hussar 28 Aug: John Barry 30 Aug: De Grasse, M553 31 Aug: Shirataka Unknown date: Condorcet, Marechal Petain, U-925
Other incidents	4 Aug: Maycrest 15 Aug: LST-404 18 Aug: U-1054 20 Aug: Daronia 22 Aug: HMS Nabob 31 Aug: U-1000
1943 1944 1945 July 1944 September 1944

History

Nazi Germany
Name	U-413
Ordered	15 August 1940
Builder	Danziger Werft, Danzig
Yard number	114
Laid down	25 April 1941
Launched	15 January 1942
Commissioned	3 June 1942
Fate	Sunk on 20 August 1944 in the Cornish corridor, 15 miles off the coast near Padstow, by a naval mine. 45 dead and one survivor^[1]
General characteristics
Class and type	Type VIIC submarine
Displacement	769 tonnes (757 long tons) surfaced 871 t (857 long tons) submerged
Length	67.10 m (220 ft 2 in) o/a 50.50 m (165 ft 8 in) pressure hull
Beam	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels) 750 PS (550 kW; 740 shp) (electric)
Propulsion	2 shafts 2 × diesel engines 2 × electric motors
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	230 m (750 ft) Crush depth: 250–295 m (820–968 ft)
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × G7e torpedoes 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 × 2 cm (0.79 in) C/30 anti-aircraft guns
Service record
Part of:	8th U-boat Flotilla 3 June – 31 October 1942 1st U-boat Flotilla 1 November 1942 – 20 August 1944
Identification codes:	M 03 918
Commanders:	Kptlt. Gustav Poel 3 June 1942 – 19 April 1944 Oblt.z.S. Dietrich Sachse 20 April – 20 August 1944
Operations:	7 patrols: 1st patrol: a. 22 – 24 October 1942 b. 28 October – 25 November 1942 2nd patrol: 27 December 1942 – 17 February 1943 3rd patrol: 29 March – 13 June 1943 4th patrol: a. 4 – 5 September 1943 b. 8 – 18 September 1943 c. 27 – 28 September 1943 d. 2 October – 21 November 1943 5th patrol: 26 January – 27 March 1944 6th patrol: 6 – 9 June 1944 7th patrol: 2 – 20 August 1944
Victories:	5 merchant ships sunk (36,885 GRT) 1 warship sunk (1,100 tons)