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German submarineU-711

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Coordinates:68°48′N16°38′E / 68.800°N 16.633°E /68.800; 16.633

From Wikipedia, the free encyclopedia

German World War II submarine

History

Nazi Germany
Name	U-711
Ordered	7 December 1940
Builder	H. C. Stülcken Sohn, Hamburg
Yard number	777
Laid down	31 July 1941
Launched	25 June 1942
Commissioned	26 September 1942
Fate	Sunk on 4 May 1945
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	8,500nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph)
Test depth	230 m (750 ft) Crush depth: 250–295 m (820–968 ft)
Complement	44–60 officers & ratings
Armament	5 × 53.3 cm (21 in)torpedo tubes (four bow, one stern) 14 ×torpedoes 1 ×8.8 cm (3.46 in) deck gun (220 rounds) 2 × twin2 cm (0.79 in) C/30 anti-aircraft guns
Service record
Part of:	5th U-boat Flotilla 26 September 1942 – 31 March 1943 11th U-boat Flotilla 1 April – 31 May 1943 13th U-boat Flotilla 1 June 1943 – 4 May 1945
Identification codes:	M 50 659
Commanders:	Oblt.z.S. /Kptlt.Hans-Günther Lange 26 September 1942 – 4 May 1945
Operations:	12 patrols: 1st patrol: a. 25 March – 30 April 1943 b. 12 – 14 May 1943 2nd patrol: 25 May – 18 June 1943 3rd patrol: a. 22 July – 30 September 1943 b. 2 – 5 October 1943 c. 15 – 17 December 1943 d. 18 – 19 December 1943 e. 20 – 23 December 1943 f. 19 – 21 March 1944 4th patrol: 22 March – 6 April 1944 5th patrol: 11 – 15 April 1944 6th patrol: 24 April – 5 May 1944 7th patrol: a. 30 May – 8 July 1944 b. 29 – 30 July 1944 8th patrol: a. 2 – 19 August 1944 b. 22 – 26 August 1944 c. 27 – 28 August 1944 d. 3 – 5 September 1944 9th patrol: a. 7 September – 4 October 1944 b. 6 – 8 October 1944 c. 23 – 26 January 1945 10th patrol: 9 – 24 February 1945 11th patrol: 14 – 31 March 1945 12th patrol: 15 April – 2 May 1945
Victories:	1 merchant ship sunk (10 GRT) 1 warship sunk (925 tons) 1 auxiliary warship damaged (20 GRT)

German submarineU-711 was aType VIIC U-boat ofNazi Germany'sKriegsmarine duringWorld War II.

Ordered 7 December 1940,laid down, 31 July 1941 andlaunched 25 June 1942. She was commanded byOberleutnant zur SeeHans-Günther Lange (who was awarded the Knights Cross).

Design

[edit]

German Type VIIC submarines had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.^[1]U-711 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, twoAEG GU 460/8–27double-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).^[1]

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).^[1] 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-711 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, removed in the summer of 1944, when she was fitted with theschnorkeland and two, twin2 cm (0.79 in) C/30 anti-aircraft guns. The boat had acomplement of between forty-four and sixty.^[1]

Service history

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During her active service career, U-711 sank 2 ships and damaged a third.

U-711 attacked and sank the British corvetteHMS Bluebell on 17 February 1945 with anacoustic homing torpedo, which caused herdepth charges to explode.Bluebell sank in less than 30 seconds and from her crew of 86 there was only one survivor.^[2]

*U-711* is just visible behind water columns, smoke and the depot shipBlack Watch

Fate

[edit]

On 4 May 1945,U-711 was sunk by aircraft of theFleet Air Arm duringOperation Judgement, an attack on the depot shipsMS Black Watch andSenja anchored atKilbotn, south of Harstad, Norway. This was the last air-raid of the war in Europe.

Avenger andWildcat aircraft, from FAA Squadrons846,853 and882, operating from the Britishescort carriers HMS Trumpeter,HMS Queen andHMS Searcher sank theBlack Watch with 7 direct hits and 4 near misses.U-711, was moored alongside and was damaged but managed to sail away. The U-boat had a harbour crew of eight on board, including the captain, who all survived although forty of her crew who were berthed on the depot ship were killed. The submarine later sank at68°48′N16°38′E / 68.800°N 16.633°E /68.800; 16.633.

A few hours earlier Lange had received the signal from Germany ordering all U-boats to cease attacks on Allied shipping.^[3]

Wolfpacks

[edit]

U-711 took part in ninewolfpacks, namely:

Wiking (1 August – 20 September 1943)
Blitz (24 March – 5 April 1944)
Keil (11 – 14 April 1944)
Donner & Keil (24 April – 3 May 1944)
Grimm (31 May – 6 June 1944)
Trutz (8 June – 7 July 1944)
Greif (3 – 18 August 1944)
Rasmus (9 – 13 February 1945)
Hagen (15 – 21 March 1945)

Summary of raiding history

[edit]

Date	Ship Name	Nationality	Tonnage^{[Note 1]}	Fate^[4]
13 April 1944	Solvoll	Norway	10	Sunk
17 February 1945	HMS Bluebell	Royal Navy	925	Sunk
22 March 1945	VPS-5	Soviet Navy	20	Damaged

Dive site

[edit]

As no-one was killed during her sinking,U-711's location is not classed as awar grave and is a well-documented dive-site, lying at approximately 50 meters depth and only having minor damage.^[5]

References

[edit]

Notes

[edit]

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

Citations

[edit]

^^a ^b ^c ^dGröner 1991, pp. 43–46.
^Naval History HMS Bluebell.
^Harald Isachsen (2009),Operation Judgement: Angrepet på <<Black Watch>>, Kilbotn 4 Mai 1945,ISBN 978-82-998024-2-0
^Helgason, Guðmundur."Ships hit by U-711".German U-boats of WWII - uboat.net. Retrieved10 February 2014.
^Wreck site - U-711

Bibliography

[edit]

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.
Gröner, Erich; 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-711".German U-boats of WWII - uboat.net. Retrieved29 December 2014.
Hofmann, Markus."U 711".Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). 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 May 1945
Shipwrecks	1 May:Argo,TA 43,U-3006,U-3009 2 May:Admiral Hipper,USS Thornton,U-8,U-14,U-60,U-61,U-62,U-71,U-72,U-120,U-121,U-137,U-139,U-140,U-141,U-142,U-146,U-148,U-151,U-152,U-316,U-552,U-554,U-612,U-717,U-929,U-1007,U-1308,U-2327,U-2359,U-2510,U-2526,U-2527,U-2528,U-2531,U-3002,U-3016,U-3018,U-3019,U-3020,U-3021,U-3504,U-3516,U-3517,U-3521,U-3522 3 May:Arcona,Cap Arcona,Deutschland,Emden,USS Lagarto,USS Little,USS LSM(R)-195,Medusa,Nordland,Schlesien,TA22,Thielbek,UA,UB,UD-1,UD-2,UD-3,UD-4,U-48,U-52,U-57,U-58,U-59,U-101,U-328,U-339,U-428,U-446,U-475,U-560,U-704,U-708,U-747,U-748,U-795,U-822,U-828,U-876,U-903,U-922,U-924,U-958,U-1166,U-1170,U-1192,U-1196,U-1201,U-1205,U-1210,U-1227,U-1275,U-2330,U-2332,U-2355,U-2371,U-2501,U-2503,U-2504,U-2508,U-2512,U-2519,U-2520,U-2521,U-2524,U-2533,U-2534,U-2535,U-2536,U-2539,U-2543,U-2545,U-2546,U-2548,U-2552,U-3001,U-3005,U-3010,U-3011,U-3012,U-3013,U-3014,U-3023,U-3024,U-3025,U-3026,U-3027,U-3028,U-3029,U-3031,U-3032,U-3037,U-3038,U-3039,U-3040,U-3507,U-3509,U-3511,U-3513,U-3518,U-3525,U-3530,U-4705,U-4712,Z43 4 May:USS LSM(R)-190,USS LSM(R)-194,USS Luce,USS Morrison,Orion,USS PGM-17,U-30,U-46,U-267,U-393,U-711,U-721,U-792,U-793,U-904,U-1132,U-1161,U-1168,U-1303,U-1304,U-2338,U-2540,U-3033,U-3034,U-4709,U-4711 5 May:T36,U-17,U-38,U-236,U-290,U-349,U-351,U-370,U-397,U-534,U-579,U-733,U-746,U-750,U-794,U-827,U-999,U-1008,U-1016,U-1025,U-1056,U-1162,U-1193,U-1204,U-1207,U-1223,U-1234,U-1306,U-1405,U-2333,U-2339,U-2343,U-2346,U-2347,U-2349,U-2352,U-2357,U-2358,U-2360,U-2362,U-2364,U-2366,U-2367,U-2368,U-2369,U-2507,U-2517,U-2522,U-2525,U-2541,U-2544,U-2551,U-3015,U-3022,U-3044,U-3501,U-3510,U-3524,U-3526,U-3527,U-3528,U-3529,U-4701,U-4702,U-4703,U-4704,U-4707,U-4710 6 May:U-853,U-881,U-3523 7 May:Avondale Park,Sneland I,U-1407 8 May:U-37,U-320,U-382,U-2365,U-2538,U-3030,U-3503 16 May:Haguro,Hatsutaka,U-287 18 May:USS Longshaw 20 May:U-963 24 May:HMMotor Gun Boat 2007,U-979 25 May:USS Bates,USS LSM-135 28 May:USS Drexler 29 May:Tenryo Maru 31 May:I-361,Uzbekistan
Other incidents	3 May:USS Aaron Ward 4 May:HMS Formidable,USS Sangamon 9 May:USS England,USS Oberrender 11 May:USS Bunker Hill,USS Evans,USS Hugh W. Hadley 19 May:Kashima,HMS Terrapin 20 May:USS Chase,USS Thatcher 25 May:USS Barry,USS Spectacle,William B. Allison 26 May:USS PC-1603 29 May:USS Shubrick 31 May:Hebrides Unknown date:Nymphe,U-1197
194419451946 April 1945June 1945

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