German submarine U-877

German submarine U-877 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine during the Second World War. The ship was ordered on 2 April 1942, laid down on 22 May 1943, and launched on 10 December 1943. She was commissioned into the Kriegsmarine under the command of Kapitänleutnant Eberhard Findeisen on 24 March 1944. Initially assigned to the 4th U-boat Flotilla, she was transferred to the 33rd U-boat Flotilla on 1 December 1944.

Design
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-877 had a displacement of 1144 t when at the surface and 1257 t while submerged. The U-boat had a total length of 76.76 m, a pressure hull length of 58.75 m, a beam of 6.86 m, a height of 9.60 m, and a draught of 4.67 m. The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4400 PS for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1000 shp for use while submerged. She had two shafts and two 1.92 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 18.3 kn and a maximum submerged speed of 7.3 kn. When submerged, the boat could operate for 63 nmi at 4 kn; when surfaced, she could travel 13850 nmi at 10 kn. U-877 was fitted with six 53.3 cm torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm SK C/32 naval gun, 180 rounds, and a 3.7 cm Flak M42 as well as two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of forty-eight.

Service history
She carried out a single war patrol, departing Horten Naval Base on 25 November 1944. Two days later she was attacked by Bristol Beaufighters of No. 489 Squadron, which launched two depth charges at her. She crash dived, escaping the attackers, but losing her radar antenna.

U-877 was attacked on 27 December 1944 in the North Atlantic, north-west of the Azores, by the Royal Canadian Navy's Castle-class corvette HMCS St. Thomas (K488). She was badly damaged by St. Thomas's squid mortar and sank at position 46.41667°N, -36.63333°W, after her crew had abandoned ship. All 56 were picked up by St. Thomas.

The end of the submarine and the friendship that develops between both captains is described in the book "Ne Tirez Pas" (Don't shoot) written by Jean-Louis Morgan and Linda Sinclair published by Edition l'Archipel ISBN 9782809800135.