German submarine U-487 was a Type XIV supply and replenishment U-boat ("Milchkuh") of Nazi Germany's Kriegsmarine during World War II.

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History
Nazi Germany
Name	U-487
Ordered	17 July 1941
Builder	Germaniawerft, Kiel
Yard number	556
Laid down	31 December 1941
Launched	17 October 1942
Commissioned	21 December 1942
Fate	Sunk on 13 July 1943[1]
General characteristics
Class and type	Type XIV ocean-going submarine tanker
Displacement	1,688 t (1,661 long tons) surfaced 1,932 t (1,901 long tons) submerged
Length	67.10 m (220 ft 2 in) o/a 48.51 m (159 ft 2 in) pressure hull
Beam	9.35 m (30 ft 8 in) o/a 4.90 m (16 ft 1 in) pressure hull
Height	11.70 m (38 ft 5 in)
Draught	6.51 m (21 ft 4 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels) 750 PS (550 kW; 740 shp) (electric)
Propulsion	2 shafts 2 × diesel engines 2 × electric motors
Speed	14.4–14.9 knots (26.7–27.6 km/h; 16.6–17.1 mph) surfaced 6.2 knots (11.5 km/h; 7.1 mph) submerged
Range	12,350 nmi (22,870 km; 14,210 mi) at 10 knots (19 km/h; 12 mph) surfaced 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	240 m (790 ft)
Complement	6 officers and 47 enlisted
Armament	2 × 3.7 cm (1.5 in) SK C/30 anti-aircraft guns 1 × 2 cm (0.79 in) C/30 AA gun
Service record[2][3]
Part of:	4th U-boat Flotilla 21 December 1942 – 31 March 1943 12th U-boat Flotilla 1 April 1943 – 13 July 1943
Identification codes:	M 49 344
Commanders:	Oblt.z.S. Helmut Metz 21 December 1942 – 13 July 1943
Operations:	2 patrols: 1st patrol: 27 March – 12 May 1943 2nd patrol: 15 June – 13 July 1943
Victories:	None

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Her keel was laid down 31 December 1941 by Germaniawerft in Kiel as yard number 556. She was launched on 17 October 1942 and commissioned on 21 December 1942 with Oberleutnant zur See Helmut Metz in command. Metz commanded the boat for its entire career.^[2]

Her service began with training as part of the 4th U-boat Flotilla. She then joined the 12th flotilla for operations.

German Type XIV submarines were shortened versions of the Type IXDs they were based on. U-487 had a displacement of 1,688 tonnes (1,661 long tons) when at the surface and 1,932 tonnes (1,901 long tons) while submerged.^[4] The U-boat had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 48.51 m (159 ft 2 in), a beam of 9.35 m (30 ft 8 in), a height of 11.70 m (38 ft 5 in), and a draught of 6.51 m (21 ft 4 in). The submarine was powered by two Germaniawerft supercharged four-stroke, six-cylinder diesel engines producing a total of 2,800–3,200 metric horsepower (2,060–2,350 kW; 2,760–3,160 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/38-8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to 240 metres (790 ft).^[4]

The submarine had a maximum surface speed of 14.4–14.9 knots (26.7–27.6 km/h; 16.6–17.1 mph) and a maximum submerged speed of 6.2 knots (11.5 km/h; 7.1 mph).^[4] When submerged, the boat could operate for 120 nautical miles (220 km; 140 mi) at 2 knots (3.7 km/h; 2.3 mph); when surfaced, she could travel 12,350 nautical miles (22,870 km; 14,210 mi) at 10 knots (19 km/h; 12 mph). U-487 was not fitted with torpedo tubes or deck guns, but had two 3.7 cm (1.5 in) SK C/30 anti-aircraft guns with 2500 rounds as well as a 2 cm (0.79 in) C/30 guns with 3000 rounds. The boat had a complement of fifty-three.^[4]

U-487 conducted two patrols. As a supply boat, she avoided combat.^[2]