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U-boat. U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. The term is an anglicized version of the German word U-Boot [ˈuːboːt] ⓘ, a shortening of Unterseeboot (under-sea boat), though the German term refers to any submarine. Austro-Hungarian Navy submarines were also known as U-boats.
The Atlantic U-boat campaign of World War I (sometimes called the "First Battle of the Atlantic", in reference to the World War II campaign of that name) was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France.
The Type UB I submarine (sometimes known as the UB-1 class) was a class of small coastal submarines built in Germany at the beginning of the First World War.Twenty boats were constructed, most of which went into service with the German Imperial Navy (Kaiserliche Marine) Boats of this design were also operated by the Austro-Hungarian Navy (Kaiserliche und Königliche Kriegsmarine or K.u.K ...
Razorback. Razorback off Hawaii ca. the 1960s after GUPPY IIA conversion. / 34.75361°N 92.26361°W / 34.75361; -92.26361. USS Razorback (SS-394), a Balao -class submarine, was the only ship of the United States Navy to be named after the razorback, a species of whale ( Balaenoptera physalus) found in the far southern reaches of the ...
4 × 18 inch (450 mm) torpedo tubes, 8 torpedoes. 1 × 3"/23 caliber retractable deck gun (gun on EB design only) [1] The United States L-class submarines were a class of 11 coastal defense submarines built 1914–1917, and were the most modern and capable submarines available to United States Navy when the country entered World War I.
The RMS Lusitania was a British-registered ocean liner that was torpedoed by an Imperial German Navy U-boat during the First World War on 7 May 1915, about 11 nautical miles (20 kilometres) off the Old Head of Kinsale, Ireland. The attack took place in the declared maritime war-zone around the UK, three months after unrestricted submarine ...
According to the submarine war diary entry, the U-boat dived and maneuvered into an attack position, firing one torpedo out of the stern tube at 2015 from a range of about 550 meters (600 yd). Minutes later, the torpedo hit Tampa and exploded portside amidships, throwing up a huge, luminous column of water. [ 20 ]
U-9 had an overall length of 57.38 m (188 ft 3 in), her pressure hull was 48 m (157 ft 6 in) long. The boat's beam was 6 m (19 ft 8 in) (o/a), while the pressure hull measured 3.65 m (12 ft 0 in). She had a draught of 3.13 m (10 ft 3 in) with a total height of 7.05 m (23 ft 2 in). The boat displaced 493 t (485 long tons) when surfaced and 611 t ...