Valentin submarine pens are in Farge, a small port on the Weser River north of Bremen in the state of Bremen. The pens were built in World War II from 1943 to March 1945, and they were not finished before the end of the war. Farge is a small port on the Weser River north of Bremen. ... Weser watershed Orthographic projection centred over Bremen The Weser is a river of north-western Germany. ... This article is about the city in Germany. ... The Free Hanseatic City of Bremen (official name in German: Freie Hansestadt Bremen) is the smallest of Germanys 16 Federal States (Bundesländer). ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000...

The Farge U-boat pen after being hit by a Grand Slam bomb - note the figure standing on the pile of rubble.

Bombing by the RAF and the USAAF dramatically reduced production of U-boots by the German shipyards, so a bomb proof shelter was built under the codename Valentin at Farge in Bremen. Image File history File links Download high resolution version (800x1142, 549 KB) Please see the file description page for further information. ... Image File history File links Download high resolution version (800x1142, 549 KB) Please see the file description page for further information. ... U-boat pens were large concrete bunkers erected along Frances Bay of Biscay by the German Third Reich during World War II. The pens were designed to protect German submarines (U-boats) from Allied bombs, and were generally effective until the introduction of the Tallboy bomb which was able... A British 22,000 lb (10,000 kg) Grand Slam bomb The Grand Slam (Earth Quake bomb), was a very large freefall bomb developed by the British aeronautical engineer Barnes Wallis (who also made the bouncing bomb) in late 1944. ... U-boat is also a nickname for some diesel locomotives built by GE; see List of GE locomotives October 1939. ...

It was planned that they would be used for assembly of the submarines of the type XXI. Type XXI U-boat U 3008, postwar photo Type XXI U-boats, also known as the Elektroboote, were the first submarines designed to operate entirely submerged, rather than as surface ships that could submerge as a temporary means to escape detection or launch an attack. ...

The pens were attacked by the RAF on 27 March 1945. Their ferrous concrete roof was up to 7 metres (23 feet) thick. Two Grand Slam bombs penetrated a section with a 4.5 m roof.^[1] March 27 is the 86th day of the year in the Gregorian calendar (87th in leap years). ... 1945 (MCMXLV) was a common year starting on Monday. ... Reinforced concrete at Sainte Jeanne dArc Church (Nice, France): architect Jacques Dror, 1926–1933 Reinforced concrete, also called ferroconcrete in some countries, is concrete in which reinforcement bars (rebars) or fibers have been incorporated to strengthen the material that would otherwise be brittle. ... metre or meter, see meter (disambiguation) The metre is the basic unit of length in the International System of Units. ...

The Valentin U-boat pens were the largest fortified pens in Germany, and were second only to those built at Brest in France. U-boat pens were large concrete bunkers erected along Frances Bay of Biscay by the German Third Reich during World War II. The pens were designed to protect German submarines (U-boats) from Allied bombs, and were generally effective until the introduction of the Tallboy bomb which was able... Brest is the name of several cities: City in Belarus: Brest, Belarus, formerly in Russia and the Soviet Union and formerly known as Brest-Litovsk. ...

References

Footnotes

1. ^ RAF: Bomber Command: Grand Slams