Unterseeboot 1

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Unterseeboot 1 or U-1 has been the name of several German submarines or U-boats during the First World War, the Second World War and in the post-war Bundesmarine.

• Unterseeboot 1 (1906) was the first ever German submarine built in 1906 for service in the German Navy. She spent the First World War as a training boat, and is now a museum ship.
  • During the First World War, Germany also possessed the submarines
    • UB-1, built in 1915 and sunk in 1918
    • UC-1, built in 1915 and sunk in 1917
  • The Austro-Hungarian Navy also possessed a Unterseeboot I, built in 1909 and surrendered in 1918.

• Unterseeboot 1 (1935) was a Kriegsmarine submarine built in 1935, and lost in 1940 during the Second World War.

• Unterseeboot 1 (S180) is a Type 205 submarine of the Bundesmarine, built in 1967, and sold in 1991.

For other uses of the conjunction U-1, see the disambiguation page