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U-47 had a displacement of 761 metric tons, 865 tons submerged. She was powered by two 1400 PS (1 MW) diesel engines and two 375 PS (280 kW) electric motors. Her speed was 17 knots (31 km/h) on the surface and 7.6 knots (14 km/h) submerged. Her underwater armament consisted of 4 torpedo tubes in the bowA boat like a ship, is a buoyant vessel designed for the purpose of transporting people and possibly goods across water. A boat is usually smaller than a ship. Some boats are commonly carried by a ship or on land using trailers. A boat consists of one or and 1 torpedo tube in the stern. The deck artillery consisted of an 88 mm gunA gun is an aimable weapon that fires projectiles at high velocity, or a device that resembles such a weapon used for other purposes (e. glue gun in common usage. The term is also used for types of artillery with long barrels that fire at a relatively fla and a 20 mm machine gunA machine gun is a fully-automatic firearm that is capable of firing bullets in rapid succession. Overview M2 machine gun surrounded by spent shell casings Unlike semi-automatic firearms, which require one trigger pull per bullet fired, a machine gun will. The vessel's range was 6500 nautical mileA nautical mile is a unit of distance, or, as physical scientists like to call it, length. It is widely used around the world for maritime and aviation purposes. The international nautical mile is defined as exactly 1,852 metres. This definition was adopts (12,000 km).

U-47 became famous when, on October 14, 1939Events January-June January 2 End of term for Frank Finley Merriam, 28th Governor of California. He is succeeded by Culbert Levy Olson. January 24 Earthquake kills 30. 000 in Chile about 50. 000 sq mi razed January 26 Falangists take Barcelona January 26, under the command of Günther PrienKorvettenkapitan Gunther Prien ( January 16, 1908 March 7, 1941) was one of the three outstanding U-boat aces of the first part of the Second World War, and the first U-boat commander to win the Knight's Cross. Under Prien's command, the submarine U-47 sa, she entered the base of the British home fleet at Scapa FlowScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom. Surrounded by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy, it is best known as the site of the United Kingdom's chief naval base during the First and Sec, and sank HMS Royal Oak.

U-47 carried out ten combat patrols and spent a total of 238 days at sea. She sank 30 enemy merchant ships (164,953 tons) and damaged eight more.

She was sunk on March 8, 1941 by the British destroyer HMS Wolverine west of Ireland.