Submarine pen

Submarine pen

A submarine pen is a bunker to protect submarines or U-boats from bombing.

German World War II U-boat pens in France included Saint-Nazaire, Lorient, La Rochelle and Toulon. In Norway, Trondheim was the site of a large pen. U-boat pens protecting construction of the German Type XXI submarine were located at Hamburg (Blohm & Voss), Bremen (AG Weser), and Danzig (F. Schichau).

;Bombing of U-boat Pens & Yards during World War IIThe Casablanca Conference established the Nazi Germany U-boat pens as the Allied bombing priority.

cite web |url=http://books.google.com/books?id=MzXKtRY2mxwC&pg=PA48&lpg=PA48&dq=%22January+14%22+1943+u-boat&source=web&ots=jmJTJ3aQxM&sig=6ZJOkDHLQz3P82wIcFmCYcTNogE&hl=en&sa=X&oi=book_result&resnum=4&ct=result |format=html |accessdate=2008-07-09 |title=Hitler's U-boat Fortresses |first=Randolph |last=Bradham |page=p49-51] [cite web |url=http://www.history.com/this-day-in-history.do?action=Article&id=6677 |format=html |accessdate=2008-07-09 |title=Roosevelt and Churchill begin Casablance Conference |work=This Day in History |publisher=history.com] [cite web |url=http://history.howstuffworks.com/world-war-ii/russian-army-repels-hitlers-forces13.htm |title=World War II Timeline: January 14, 1943-January 21, 1943 |work=Russian Army Repels Hitler's Forces: August 1942-January 1943 |publisher=Legacy Publishers |format=html |accessdate=2008-07-09] Operation Aphrodite radar-guided bombers, BATTY guided bombs, Tallboy bombs and Grand Slam bombs were subsequently used to attack the U-boat pens.

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