German submarine U-977

German submarine U-977 was a World War II Type VIIC U-boat of Nazi Germany's Kriegsmarine which escaped to Argentina after Germany's surrender. The submarine's voyage to Argentina led to legends, apocryphal stories and conspiracy theories that it and U-530 had transported escaping Nazi leaders (including Adolf Hitler) and/or Nazi gold to South America, that it had made a secret voyage to Antarctica, and even that it sank the Brazilian cruiser Bahia as the last act of the Battle of the Atlantic.[1][2]

U-977 moored at Mar del Plata naval base
Nazi Germany
Name: U-977
Ordered: 5 June 1941
Builder: Blohm & Voss, Hamburg
Yard number: 177
Laid down: 24 July 1942
Launched: 31 March 1943
Commissioned: 6 May 1943
Captured: Surrendered to Argentine Navy 17 August 1945 at Mar del Plata, Argentina
Fate: Sunk by torpedo from USS Atule during torpedo trials, 13 November 1946
General characteristics
Class and type: Type VIIC U-boat
  • 769 tonnes (757 long tons) surfaced
  • 871 t (857 long tons) submerged
  • 6.20 m (20.3 ft) o/a
  • 4.70 m (15.4 ft) pressure hull
Draught: 4.74 m (15.6 ft)
  • Surfaced: 3,200 PS (2,400 kW; 3,200 bhp)
  • Submerged: 750 PS (550 kW; 740 shp)
  • Surfaced 17.7 knots (32.8 km/h; 20.4 mph)
  • submerged 7.6 knots (14.1 km/h; 8.7 mph)
  • Surfaced: 8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph)
  • submerged: 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph)
Test depth: Calculated crush depth: 220 m (720 ft)
Complement: 4 officers, 40–56 enlisted


German Type VIIC submarines were preceded by the shorter Type VIIB submarines.

U-977 was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines while surfaced and two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors while submerged. She had two shafts and two 1.23 m (4 ft) propellers.

U-977 had a complement of between 44 and 60 men.[3]

FLAK gun

U-977 mounted a single 3.7 cm Flakzwilling M42U gun on the rare LM 43U mount. The LM 43U mount was the final design of mount used on U-boats and is only known to be installed on (U-249, U-826, U-1023, U-1171, U-1305 and U-1306). The 3.7 cm Flak M42U was the marine version of the 3.7 cm Flak, used by the Kriegsmarine on Type VII and Type IX U-boats.

Service history

U-977 was launched in March 1943. She was used in training and made no war patrols during her first two years of service. On 2 May 1945 she was sent on her first war patrol, sailing from Kristiansand, Norway, commanded by Oberleutnant zur See Heinz Schäffer (1921–1979). Schäffer's orders were to enter the British port of Southampton and sink any shipping there. This would have been a very dangerous assignment for a Type VII boat. When Admiral Dönitz ordered all attack submarines to stand down on 5 May 1945, U-977 was outbound north of Scotland.

Voyage to Argentina

Oblt.z.S. Schäffer decided to sail to Argentina rather than surrender. During later interrogation, Schäffer said his main reason was a German propaganda broadcast by Goebbels, which claimed that the Allies' Morgenthau Plan would turn Germany into a "goat pasture” and that all German men would be "enslaved and sterilized". Other factors were remembrances of the poor conditions and long delays that German POWs suffered through, in being repatriated at the end of World War I (see Forced labor of Germans after World War II), and the hope of better living conditions in Argentina, which had a large German community.

Schäffer offered the married crewmen the option of going ashore in Europe. Sixteen chose to do so and were landed from dinghies on Holsnøy Island near Bergen on 10 May .

U-977 then sailed to Argentina. Schäffer's version of the voyage states that from 10 May to 14 July 1945 she made a continuous submerged Schnorchel passage, "at 66 days the second longest in the war [sic - Germany had surrendered] (after U-978's 68 days)".

The U.S. Navy (USN) interrogated the crew and issued a report on 19 September 1945.[4] The report does not mention a 66-day submerged voyage, but states that U-977 "made for the Iceland Passage on course 300° (that is, a little North by West) diving once on sighting a plane and once on sighting a ship: "she was also D/F'd many times late in May". (This can also mean traversing in Schnorchel depth and then diving on contact; possible translation errors during interrogations and interrogators failing to ask clarifying questions.)

According to the Navy report, the submarine stopped in the Cape Verde Islands for a short break, then completed the trip traveling on the surface using one engine. Crossing the equator on 23 July, she arrived in Mar del Plata, Argentina on 17 August after 99 days at sea from Bergen and a voyage of 14,157 km (7,644 nmi, 8,797 mi). These points agree with Schäffer's report that he stopped at Cape Verde Islands for a short break and crossed the Equator on 23 or 24 July 1945.

Schäffer said that, after the short Cape Verde break, they completed the rest of the trip to Mar del Plata alternately on the surface and submerged.[5]

After surrendering to the Argentine authorities, as had happened to the crew of U-530, they were extradited to the US where they responded to the charge of having torpedoed the cruiser Bahia, and then to the UK, where they faced accusations that they had landed Nazi leaders in Argentina before surrendering. Schaeffer was released in 1947. U-977 like U-530 was seized by the US Navy, and sunk during naval firing exercises, in its case in 1946, when it was used as a target.[6]

In the arts

Schäffer later wrote a book: U-977 – 66 Tage unter Wasser ("U-977 – 66 Days Under Water"), the first postwar memoir by a former U-boat officer. It was published in 1952, and was translated into English under the title U-boat 977.

A documentary film U-977 - 66 Days Under Water directed by Nadine Poulain, Schäffer's granddaughter, was in the final stages of production in 2014.

See also


  1. Salinas & De Nápoli , 2002.
  2. Paterson, 2009. Pages 27 to 33.
  3. Gröner 1991, pp. 43-46.
  4. Office of Naval Intelligence (19 September 1945). "Report on the Interrogation of Prisoners from U-977 (File Op-16-2)". U.S. Navy. Archived from the original on 29 March 2009. Retrieved 21 August 2009.
  5. Paterson, 2009. Pages 27 to 33.
  6. Kittel & Graf, 2015. p.93.


  • Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
  • Juan Salinas & Carlos De Nápoli (2002) Ultramar Sur: la última operación secreta del Tercer Reich ("South Overseas: the last secret operation of Third Reich") (in Spanish) Grupo Editorial Norma ISBN 9789875450752
  • Kittel & Graf (2015) The History of U-Boot Edizione R.E.I. ISBN 9782372971768
  • Paterson, Lawrence (2009) Black Flag: The Surrender of Germany's U-Boat Forces on Land and at Sea Seaforth Publishing ISBN 9781848320376
  • Schäffer, Heinz (2006). El Secreto del U-977. Buenos Aires: Editorial Hisma. ISBN 987-22996-0-9.
  • Schäffer, Heinz, Leonce Peillard Der U-Boot-Krieg 1999 ISBN 3-453-14825-8 (In German)
  • Schäffer, Heinz, U-Boat 977: The U-Boat That Escaped to Argentina 2005 ISBN 1-84145-027-8 (First published in Germany in 1952 as U-977 – 66 Tage unter Wasser)

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