German submarine U-1223

{{Short description|German World War II submarine}}

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|Ship caption=

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{{Infobox ship career

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|Ship country=Nazi Germany

|Ship flag={{shipboxflag|Nazi Germany|naval}}

|Ship name=U-1223

|Ship ordered=25 August 1941

|Ship builder=Deutsche Werft AG, Hamburg

|Ship yard number= 386

|Ship laid down= 25 November 1942

|Ship launched=23 June 1943

|Ship commissioned=6 October 1943

|Ship decommissioned=14 April 1945

|Ship homeport=

|Ship motto=

|Ship nickname=

|Ship fate=Scuttled on 5 May 1945 in position {{coord|53|32|N|8|35|E|display=inline, title}}{{sfn|Busch|Röll|1999|p=340}}

|Ship notes=

}}

{{Infobox ship characteristics

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|Header caption=

|Ship class=Type IXC/40 submarine

|Ship displacement=

  • {{convert|1144|t|LT|abbr=on|lk=on}} surfaced
  • {{convert|1257|t|LT|abbr=on}} submerged

|Ship length=

  • {{convert|76.76|m|ftin|abbr=on}} o/a
  • {{convert|58.75|m|ftin|abbr=on}} pressure hull

|Ship beam=

  • {{convert|6.86|m|ftin|abbr=on}} o/a
  • {{convert|4.44|m|ftin|abbr=on}} pressure hull

|Ship height={{convert|9.60|m|ftin|abbr=on}}

|Ship draught={{convert|4.67|m|ftin|abbr=on}}

|Ship power=

  • {{convert|4400|PS|kW bhp|abbr=on}} (diesels)
  • {{convert|1000|PS|kW shp
1|abbr=on}} (electric)

|Ship propulsion=

|Ship speed=

  • {{convert|18.3|kn|lk=in}} surfaced
  • {{convert|7.3|kn}} submerged

|Ship range=

  • {{convert|13,850|nmi|lk=in|abbr=on}} at {{convert|10|kn}} surfaced
  • {{convert|63|nmi|abbr=on}} at {{convert|4|kn}} submerged

|Ship test depth={{convert|230|m|ft|abbr=on}}

|Ship complement=4 officers, 44 enlisted

|Ship armament=*6 × torpedo tubes (4 bow, 2 stern)

|Ship notes=

}}{{Infobox service record

|is_ship=yes

|label=

|partof=

|codes=M 53 099

|commanders=

  • Kptlt. Harald Bosüner
  • 6 October 1943 – March 1944
  • Oblt.z.S. Albert Kneip
  • March 1944 – 28 April 1945

|operations=*1 patrol:

  • 28 August – 24 December 1944

|victories=

  • 1 warship total loss
    (1,370 tons)
  • 1 merchant ship damaged
    ({{GRT|7,134}})

}}

German submarine U-1223 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II.

Design

German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-1223 had a displacement of {{convert|1144|t|LT}} when at the surface and {{convert|1257|t|LT}} while submerged.{{sfn|Gröner|1991|p=68}} The U-boat had a total length of {{convert|76.76|m|ftin|abbr=on}}, a pressure hull length of {{convert|58.75|m|ftin|abbr=on}}, a beam of {{convert|6.86|m|ftin|abbr=on}}, a height of {{convert|9.60|m|ftin|abbr=on}}, and a draught of {{convert|4.67|m|ftin|abbr=on}}. The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of {{convert|4400|PS|kW shp|-1}} for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of {{convert|1000|shp|PS kW|-1}} for use while submerged. She had two shafts and two {{convert|1.92|m|ft|abbr=on|0}} propellers. The boat was capable of operating at depths of up to {{convert|230|m}}.{{sfn|Gröner|1991|p=68}}

The submarine had a maximum surface speed of {{convert|18.3|kn}} and a maximum submerged speed of {{convert|7.3|kn}}.{{sfn|Gröner|1991|p=68}} When submerged, the boat could operate for {{convert|63|nmi}} at {{convert|4|kn}}; when surfaced, she could travel {{convert|13850|nmi}} at {{convert|10|kn}}. U-1223 was fitted with six {{convert|53.3|cm|in|0|abbr=on}} torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm SK C/32 naval gun, 180 rounds, and a 3.7 cm Flak 18/36/37/43 as well as two twin 2 cm FlaK 30 anti-aircraft guns. The boat had a complement of forty-eight.{{sfn|Gröner|1991|p=68}}

Service history

U-1223 was ordered on 25 August 1941 from Deutsche Werft in Hamburg-Finkenwerder under the yard number 386. Her keel was laid down on 25 November 1942 and was launched the following year on 23 June 1943. About three months later she was commissioned into service under the command of Kapitänleutnant Harald Bosüner (Crew 35) on 6 October 1943 in the 4th U-boat Flotilla.

While working up for deployment, U-1223 Bosüner was relieved and handed over command to Oberleutnant zur See Albert Kneip (Crew X/39) in March 1944. After completing training, the U-boat transferred to the 2nd U-boat Flotilla and left Kiel for the West Atlantic on 28 August 1944 for her first and only patrol. Stopping briefly in Bergen, Norway, for replenishment, she operated off the Canadian coast, damaging {{HMCS|Magog|K673|6}} on 14 October 1944 and the British steamer {{SS|Fort Thompson||2}} on 2 November. Magog was towed back to port, but declared a constructive loss and decommissioned.

U-1223 arrived back in Kristiansand on Christmas Eve, 24 December 1944, and continued her journey to Flensburg, where she arrived three days later. Having been transferred to the 33rd U-boat Flotilla, she left Flensburg again for Königsberg on 5 January 1945, arriving there on the tenth. The U-boat experienced technical problems in the end of January 1945 and had to be towed into Stettin. From there she travelled under tow of {{GS|U-1108||2}} to Wesermünde, where she was decommissioned on 15 April 1945. Most of her crew was ordered to form a tank destroyer unit in Neustadt in Holstein under the command of the first watch officer.

When British forces closed in on the port, the U-boat was scuttled in position {{coord|53|32|N|8|35|E}} on 5 May 1945. Her wreck was later broken up for scrap.{{sfn|Busch|Röll|1999|p=340}}

Summary of raiding history

class="wikitable sortable"
width="120px"|Date

! width="180px"|Ship Name

! width="160px"|Nationality

! width="25px" |TonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

! width="80px" |Fate{{Cite web

|url=http://uboat.net/boats/successes/u1223.html

|title=Ships hit by U-1223

|last=Helgason

|first=Guðmundur

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

|access-date=9 December 2014

}}

align="right"|14 October 1944

|align="left" |{{HMCS|Magog|K673|6}}

|align="left" |{{navy|Canada|naval-1921}}

|align="right"|1,370

|align="left" |Total loss

align="right"|2 November 1944

|align="left" |Fort Thompson

|align="left" |{{flag|United Kingdom|civil}}

|align="right"|7,134

|align="left" |Damaged

References

=Notes=

{{Reflist|group=Note}}

=Citations=

{{reflist}}

Bibliography

{{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 |ref=none }}
  • {{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=German

}}

  • {{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=German Warships 1815–1945, U-boats and Mine Warfare Vessels

|volume=2

|location=London

|publisher=Conway Maritime Press

|isbn=0-85177-593-4

|ref=CITEREFGröner1991

}}

{{refend}}

{{German Type IXC/40 submarines}}

{{May 1945 shipwrecks}}

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

{{DEFAULTSORT:U1223}}

Category:World War II submarines of Germany

Category:German Type IX submarines

Category:1943 ships

Category:U-boats commissioned in 1943

Category:Ships built in Hamburg

Category:Operation Regenbogen (U-boat)

Category:Maritime incidents in May 1945