|Ordered:||10 April 1941|
|Builder:||Deutsche Werft, Hamburg|
|Laid down:||13 March 1942|
|Launched:||26 October 1942|
|Commissioned:||13 January 1943|
|Fate:||Sunk, November 1943 northeast of the Azores by one British and two Canadian warships|
|Class and type:||Type IXC/40 submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.67 m (15 ft 4 in)|
|Test depth:||230 m (750 ft)|
|Complement:||4 officers, 44 enlisted|
She carried out two patrols, but did not sink any ships. She was a member of one wolfpack.
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-536 had a displacement of 1,144 tonnes (1,126 long tons) when at the surface and 1,257 tonnes (1,237 long tons) while submerged. The U-boat had a total length of 76.76 m (251 ft 10 in), a pressure hull length of 58.75 m (192 ft 9 in), a beam of 6.86 m (22 ft 6 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.67 m (15 ft 4 in). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower (1,010 PS; 750 kW) for use while submerged. She had two shafts and two 1.92 m (6 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 18.3 knots (33.9 km/h; 21.1 mph) and a maximum submerged speed of 7.3 knots (13.5 km/h; 8.4 mph). When submerged, the boat could operate for 63 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 13,850 nautical miles (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph). U-536 was fitted with six 53.3 cm (21 in) torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm (4.13 in) SK C/32 naval gun, 180 rounds, and a 3.7 cm (1.5 in) SK C/30 as well as a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of forty-eight.
The boat departed Kiel on 1 June 1943, moved through the North Sea, negotiated the gap between Iceland and the Faroe Islands and entered the Atlantic Ocean. She entered Lorient, on the French Atlantic coast, on 9 July.
Her second foray took her as far as the Gulf of St. Lawrence, where she participated in Operation Kiebitz, an unsuccessful attempt to rescue four U-boat commanders from a prisoner of war camp in Bowmanville, east of Toronto. U-536 successfully escaped from a trap carefully laid by the Royal Canadian Navy and Royal Canadian Mounted Police at the point on the New Brunswick coast where she was to pick up the escapees on September 26, 1943. However, less than two months later, on 20 November, she was sunk northeast of the Azores by depth charges from a British frigate, HMS Nene, and two Canadian corvettes, HMCS Snowberry and HMCS Calgary.
Thirty-eight men died; there were seventeen survivors.
U-536 took part in one wolfpack, namely.