German submarine U-451

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-451 had a displacement of {{convert|769|t|LT}} when at the surface and {{convert|871|t|LT}} while submerged.{{sfn|Gröner|1991|pp=43-46}} She had a total length of {{convert|67.10|m|ftin|abbr=on}}, a pressure hull length of {{convert|50.50|m|ftin|abbr=on}}, a beam of {{convert|6.20|m|ftin|abbr=on}}, a height of {{convert|9.60|m|ftin|abbr=on}}, and a draught of {{convert|4.74|m|ftin|abbr=on}}. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of {{convert|2800 to 3200|PS|kW shp|-1}} for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of {{convert|750|PS|kW shp}} for use while submerged. She had two shafts and two {{convert|1.23|m|ft|abbr=on|0}} propellers. The boat was capable of operating at depths of up to {{convert|230|m}}.{{sfn|Gröner|1991|pp=43-46}}

The submarine had a maximum surface speed of {{convert|17.7|kn}} and a maximum submerged speed of {{convert|7.6|kn}}.{{sfn|Gröner|1991|pp=43-46}} When submerged, the boat could operate for {{convert|80|nmi}} at {{convert|4|kn}}; when surfaced, she could travel {{convert|8500|nmi}} at {{convert|10|kn}}. U-451 was fitted with five {{convert|53.3|cm|in|0|abbr=on}} torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm SK C/35 naval gun, 220 rounds, and a 2 cm FlaK 30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.{{sfn|Gröner|1991|pp=43-46}}

The boat set-off from Kiel and moved into Norwegian waters between 23 June and 24 July 1941.

She departed Kirkenes in the far north on 30 July 1941, patrolled the Barents Sea and sank one warship of 550 tons, the Soviet corvette Zhemchug (No 27), on 10 August.{{cite web

|url=http://uboat.net/allies/merchants/ships/1056.html

|title=Zhemchug (No 27)

|last=Helgason

|first=Guðmundur

|website=German U-boats of WWII - uboat.net

|access-date=26 December 2014

}} She returned to Kirkenes on 12 August.

Her second patrol, between 19 August and 12 September 1941, lasted 25 days. She then returned to Kiel.

Starting from Kiel on 25 November 1941, she sailed to Lorient in occupied France, arriving on 12 December.

Her fourth and final sortie began on 15 December 1941, taking her from Lorient, through the Bay of Biscay to a point in mid-Atlantic north of the Azores. She then turned toward the Mediterranean.

She was sunk off Tangier, Morocco, on the night of 21 December 1941 by a Fairey Swordfish Mk. I, V4431, flying with 812 Naval Air Squadron from RNAS North Front, Gibraltar. U-451 was first detected by Air-to-Surface Vessel radar (ASV) at a range of {{frac|3|1|2}} miles and about 18 miles NW of Cape Spartel. "The Swordfish closed the contact and sighted the U-Boat on the surface steering to the eastward. Three depth charges were dropped ahead of the U-Boat and across her bows. The centre depth charge of the stick, set at 25 feet, exploded immediately under the U-Boat, which was not seen again. The details of the U-Boat's disappearance could not be observed as U 451 was enveloped in the spray of the depth-charge explosions. Two large oil patches were seen, each 300 yards in diameter." The sole surviving crew member, Oberleutnant zur See (Lieutenant) Walter Köhler, stated that he was on the bridge with three ratings at the time of the attack, and that the noise of the diesel engines obscured the sound of the attacking aircraft until the moment of weapons release. He was unable to get inside the vessel before the hatch was closed. "He stated that the U-boat then sank bows down. The prisoner flung himself into the water and swam for an hour and a half before he was picked up by Myosotis."{{cite web|url=http://www.uboatarchive.net/U-451INT.htm|title=U-boat Archive - U-451 - Interrogation Report|access-date=27 January 2012|archive-date=18 December 2010|archive-url=https://web.archive.org/web/20101218185324/http://uboatarchive.net/U-451INT.htm|url-status=dead}}

{{Reflist|group=Note}}

{{reflist}}

{{Refbegin}}

• {{cite book | last1 = Busch | first1 = Rainer | last2 = Röll | first2 = Hans-Joachim | translator-last = Brooks | translator-first = Geoffrey | title = German U-boat commanders of World War II : a biographical dictionary | publisher = Greenhill Books, Naval Institute Press | location = London, Annapolis, Md | year = 1999 | isbn = 1-55750-186-6 }}
• {{cite book

|last1=Busch

|first1=Rainer

|last2=Röll

|first2=Hans-Joachim

|title=Deutsche U-Boot-Verluste von September 1939 bis Mai 1945

|trans-title=German U-boat losses from September 1939 to May 1945

|series=Der U-Boot-Krieg

|volume=IV

|publisher=Mittler

|location=Hamburg, Berlin, Bonn

|year=1999

|isbn=3-8132-0514-2

|language=de

}}

• {{Cite book |last=Gröner |first=Erich |title=Die deutschen Kriegsschiffe 1815–1945 / 3, U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. |date=1985 |publisher=Bernard & Graefe |isbn=3-7637-4802-4 |location=Koblenz |language=de |oclc=310610321}}
• {{cite book

|last1=Gröner

|first1=Erich

|last2=Jung

|first2=Dieter

|last3=Maass

|first3=Martin

|translator-last1=Thomas

|translator-first1=Keith

|translator-last2=Magowan

|translator-first2=Rachel

|year=1991

|title=U-boats and Mine Warfare Vessels

|volume=2

|series=German Warships 1815–1945

|location=London

|publisher=Conway Maritime Press

|isbn=0-85177-593-4

|ref=CITEREFGröner1991

}}

• {{cite book

|last=Kemp

|first=Paul

|title=U-Boats Destroyed - German Submarine Losses in the World Wars

|location=London

|year=1999

|publisher=Arms & Armour

|isbn=1-85409-515-3

}}

{{Refend}}

• {{Cite web

|url=http://uboat.net/boats/u451.html

|title=The Type VIIC boat U-451

|last=Helgason

|first=Guðmundur

|website=German U-boats of WWII - uboat.net

|access-date=26 December 2014

}}

{{German Type VII submarines}}

{{December 1941 shipwrecks}}

{{use dmy dates|date=December 2014}}

{{DEFAULTSORT:U0451}}

Category:German Type VIIC submarines

Category:U-boats commissioned in 1941

Category:U-boats sunk by British aircraft

Category:U-boats sunk by depth charges

Category:U-boats sunk in 1941

Category:World War II shipwrecks in the Atlantic Ocean

Category:World War II submarines of Germany

Category:1941 ships

Category:Ships built in Kiel

Category:Maritime incidents in December 1941