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German submarineU-621

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Coordinates:45°52′N02°36′W / 45.867°N 2.600°W /45.867; -2.600

From Wikipedia, the free encyclopedia

German World War II submarine

History

Nazi Germany
Name	U-621
Ordered	15 August 1940
Builder	Blohm & Voss,Hamburg
Yard number	597
Laid down	1 July 1941
Launched	19 March 1942
Commissioned	7 May 1942
Fate	Sunk on 18 August 1944
General characteristics
Class & type	Type VIIC submarine
Displacement	769tonnes (757long 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	17.7knots (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 ×torpedoesor 26 TMAmines 1 ×8.8 cm (3.46 in) deck gun (220 rounds) 1 x2 cm (0.79 in) C/30 AA gun
Service record^[1]
Part of:	8th U-boat Flotilla 7 May – 30 September 1942 9th U-boat Flotilla 1 October 1942 – 18 August 1944
Identification codes:	M 02 082
Commanders:	Kptlt. Horst Schünemann 7 May – 4 December 1942 Oblt.z.S. Max Kruschka 4 December 1942 – 7 May 1944 Oblt.z.S.Hermann Stuckmann 15 May – 18 August 1944
Operations:	10 patrols: 1st patrol: 29 September – 5 November 1942 2nd patrol: 5 December 1942 – 5 January 1943 3rd patrol: 1 February – 23 March 1943 4th patrol: 22 April – 3 June 1943 5th patrol: 22 August – 28 September 1943 6th patrol: 6 – 23 January 1944 7th patrol: 21 February – 19 April 1944 8th patrol: 6 – 23 June 1944 9th patrol: 15 July – 11 August 1944 10th patrol: 13 – 18 August 1944
Victories:	4 merchant ships sunk (20,159 GRT) 1 auxiliary warship sunk (2,938 GRT) 1 merchant ship damaged (10,048 GRT) 1 warship damaged (1,625 tons)

German submarineU-621 was aType VIIC U-boat built forNazi Germany'sKriegsmarine for service duringWorld War II.She waslaid down on 1 July 1941 byBlohm & Voss inHamburg as yard number 597,launched on 19 March 1942 andcommissioned on 7 May 1942 underKapitänleutnant Horst Schünemann.

Design

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German Type VIIC submarines were preceded by the shorterType VIIB submarines.U-621 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), apressure hull length of 50.50 m (165 ft 8 in), abeam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and adraught of 4.74 m (15 ft 7 in). The submarine was powered by twoGermaniawerft F46 four-stroke, six-cylindersupercharged 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, twoBrown, Boveri & Cie GG UB 720/8double-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-621 was fitted with five 53.3 cm (21 in)torpedo tubes (four fitted at the bow and one at the stern), fourteentorpedoes, one8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and a2 cm (0.79 in) C/30 anti-aircraft gun. The boat had acomplement of between forty-four and sixty.^[2]

Service history

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The boat's service began on 7 May 1942 for training as part of the8th U-boat Flotilla. After training was completed she transferred to the9th flotilla on 1 October 1942 for active service.

In ten patrols she sank four merchant ships for a total of 20,159 gross register tons (GRT), plus one auxiliary warship. She also damaged two more ships.

Wolfpacks

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She took part in elevenwolfpacks, namely:

Panther (10 – 16 October 1942)
Puma (16 – 29 October 1942)
Raufbold (11 – 18 December 1942)
Hartherz (3 – 7 February 1943)
Ritter (11 – 26 February 1943)
Burggraf (4 – 5 March 1942)
Raubgraf (7 – 15 March 1943)
Amsel 1 (3 – 6 May 1943)
Elbe (7 – 10 May 1943)
Elbe 2 (10 – 14 May 1943)
Mosel (19 – 24 May 1943)

Fate

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She was sunk by depth charges dropped by three Royal Canadian Navy destroyers,HMCS Ottawa,HMCS Kootenay andHMCS Chaudiere on 18 August 1944 nearLa Rochelle at position45°52′N02°36′W / 45.867°N 2.600°W /45.867; -2.600.

Summary of raiding history

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Date	Ship Name	Nationality	Tonnage^{[Note 1]}	Fate^[3]
23 October 1942	Empire Turnstone	United Kingdom	6,113	Sunk
18 December 1942	Oropos	Greece	4,474	Sunk
20 December 1942	Otina	United Kingdom	6,217	Sunk
11 March 1943	Baron Kinnaird	United Kingdom	3,355	Sunk
15 June 1944	USSLST-133	United States Navy	1,625	Damaged
29 July 1944	HMSPrince Leopold	Royal Navy	2,938	Sunk
30 July 1944	Ascanius	United Kingdom	10,048	Damaged

References

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Notes

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^Merchant ship tonnages are ingross register tons. Military vessels are listed by tonsdisplacement.

Citations

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^Helgason, Guðmundur."The Type VIIC boat U-621".German U-boats of WWII - uboat.net. Retrieved3 May 2014.
^^a ^b ^c ^dGröner 1991, pp. 43–46.
^Helgason, Guðmundur."Ships hit by U-621".German U-boats of WWII - uboat.net. Retrieved3 May 2014.

Bibliography

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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).Der U-Boot-Krieg, 1939-1945: Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945] (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. London, UK: Cassell Military Classics. p. 161.ISBN 0-304-35203-9.
Gröner, Eric; Jung, Dieter; Maass, Martin (1991).German Warships 1815-1945: U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press.ISBN 0-85177-593-4.

External links

[edit]

Helgason, Guðmundur."The Type VIIC boat U-621".German U-boats of WWII - uboat.net. Retrieved29 December 2014.

v t e 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 e 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,Sachsenwald,Thétis,U-471,U-736,U-952,U-969,V 215Oliva 7 Aug:Amsterdam,Empire Day,Nagara 8 Aug:Conte Verde,HMCS Regina,Tama Maru No. 6,V 104 Falke 9 Aug:Spichern 10 Aug:U-608 11 Aug:V 623 Jupiter,U-385,U-967 12 Aug:T-114,T-118,U-198,U-981,V 410 Germania 13 Aug:USS Flier,U-270,V 1101 Preußen 14 Aug:V 605 Arthur Duncker,Gueydon,U-618 15 Aug:U-741 16 Aug:Trémintin 17 Aug:TA35 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,V-6112Friese 20 Aug:Richard Montgomery,U-9,U-413,U-984,U-1229.V 409 August Bösch 21 Aug:HMCS Alberni,HMS Kite,HMS Orchis,U-230,V 402Dr. Adolf Spilker,Z23 22 Aug:HMS Bickerton,HMS Loyalty,Matsuwa,Tsushima Maru,U-344,V 401 Jan Mayen,V 405 J. Hinrich Wilhelms,V 413 Ferdinand Niedermeyer 23 Aug:Asakaze,U-180 24 Aug:USS Harder,NMS Mihail Kogălniceanu,U-354,U-445,Z37 25 Aug:Sperrbrecher 136,U-18,U-24,U-178,U-667,UIT-21,Yūnagi,Z24 26 Aug:Samidare,U-188,V 404 Baden,V 411 Saarland 27 Aug:HMS Britomart,Clemenceau,HMS Hussar 28 Aug:John Barry,V 407 Dorum 30 Aug:De Grasse,M553 31 Aug:Shirataka Unknown date:Condorcet,Kulmerland,Marechal Petain,U-925
Other incidents	4 Aug:Maycrest 15 Aug:LST-404 16 Aug:USS S-38 18 Aug:U-1054 20 Aug:Daronia 22 Aug:HMS Nabob 27 Aug:USS Pollack 31 Aug:U-1000
194319441945 July 1944September 1944

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