U-1-class submarine (Austria-Hungary)
The U-1 class was a class of two submarines or U-boats built for and operated by the Austro-Hungarian Navy. The boats were built to an American design at the Pola Navy Yard after domestic design proposals failed to impress the Navy. Both submarines were launched in 1909 and served as training boats through 1914. Declared obsolete in January 1918, both...
