© Clay Blair (1998) Hitler’s U-boat War: The Hunted 1942-1945. Cassell & Co., London. pages xxx-xxxi.
Type IXC U-boats carried a crew of 48 and were armed with 22 torpedoes and a 105mm deck gun. Their top speed on the surface was 18 knots (33 kilometres per hour) but submerged was only 7 knots (13 kilometres per hour).
The drawing shows the interior layout of the submarine. Starting at the bow (the front), the forward torpedo room contained 4 torpedo tubes and bunks for the crew. Moving aft (back), there were the petty officers’ bunks, the galley (kitchen), the officers’ and captain’s quarters. The control room and conning tower above contained two periscopes. Next was the diesel engine room and electric motor room. At the stern (the back) was the aft torpedo room with 2 torpedo tubes and more bunks for the crew. Battery compartments (for the electric motors) were located underneath the petty officers’ and officers’ quarters.
Both U-513 and U-518 were Type IXC submarines.