German submarine U-655 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

[3] The submarine was commissioned on 11 August 1941[3] under the command of Kapitänleutnant Adolf Dumrese (13 Nov 1909 - 24 Mar 1942).

[1] On the evening of 24 March 1942,[6] U-655 was spotted on the surface about 8.25 pm by the leading gunner on the forward four-inch gun of the minesweeper HMS Sharpshooter beam on, about two to three cables (370 to 556 meters) away and about 10 degrees off the minesweeper's starboard bow, with no crew apparently manning the conning tower or deck.

[1] The submarine turned rolled over due to the impact and bumped along the minesweeper's port side sinking as it disappeared astern and sank stern first south-east of Bear Island, in approximate position 73.00N, 21.00E.