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History
Submarine pen
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A submarine pen is a type of submarine base that acts as a bunker to protect submarines from air attack.
Surrendered German U-boats moored outside the Dora I bunker in Trondheim, Norway, May 1945
Surrendered German U-boats moored outside the Dora I bunker in Trondheim, Norway, May 1945
Forced workers at the construction site of the Valentin submarine pens in Bremen, 1944
Forced workers at the construction site of the Valentin submarine pens in Bremen, 1944
Bordeaux U-boat pens
Bordeaux U-boat pens
Brest U-boat pens
Brest U-boat pens
Submarine base
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A submarine base is a military base that shelters submarines and their personnel.
Keroman III submarine pen, part of the former German submarine base in Lorient, Brittany.
Keroman III submarine pen, part of the former German submarine base in Lorient, Brittany.
Holland Torpedo Boat Station Plaque stating New Suffolk, New York's claim to be the first submarine base.
Holland Torpedo Boat Station Plaque stating New Suffolk, New York's claim to be the first submarine base.
HMNB Clyde
HMNB Clyde
Naval Station Pearl Harbor
Naval Station Pearl Harbor