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Heinz Sieder
Born (1920-06-28)28 June 1920
Died 20 August 1944(1944-08-20) (aged 24)
Place of birth Munich
Place of death Bay of Biscay
Buried at (48°16′N 05°33′W / 48.267°N 5.55°W / 48.267; -5.55 (U-984 (U-boat)))
Allegiance  Nazi Germany
Service/branch  Kriegsmarine
Years of service 1938–1944
Rank Oberleutnant zur See
Unit SSS Gorch Fock
Commands held U-984

Spanish Civil War
World War II

Awards Knight's Cross of the Iron Cross

Heinz Sieder (28 June 1920 – 20 August 1944) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross (German language: Ritterkreuz des Eisernen Kreuzes). The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.

U-984 was sunk with all hands lost on 20 August 1944 in the Bay of Biscay west of Brest by depth charges from the Canadian destroyers HMCS Ottawa, HMCS Kootenay and HMCS Chaudière.

Summary of career

Ships attacked

As a U-boat commander of U-984 Heinz Sieder is credited with damaging one merchant ship of 7,240 gross register tons (GRT), damaging one warship for a total loss of 1,300 metric tons (1,300 long tons; 1,400 short tons), and damaging three ships for a total loss of 21,550 GRT.

Date Ship Nationality Tonnage Fate
25 June 1944 HMS Goodson  United Kingdom 1,300 Total loss
29 June 1944 Edward M. House  United States 7,240 Damaged
29 June 1944 H.G. Blasdel  United States 7,176 Total loss
29 June 1944 John A. Treutlen  United States 7,198 Total loss
29 June 1944 James A. Farrell  United States 7,176 Total loss



  1. 1.0 1.1 1.2 Busch and Röll 2003, p. 455.
  2. Busch and Röll 2003, p. 456.
  3. Fellgiebel 2000, p. 400.
  • Busch, Rainer and Röll, Hans-Joachim (2003). Der U-Boot-Krieg 1939–1945 — Die Ritterkreuzträger der U-Boot-Waffe von September 1939 bis Mai 1945 (in German). Hamburg, Berlin, Bonn Germany: Verlag E.S. Mittler & Sohn. ISBN 3-8132-0515-0.
  • Debus, Marc and Nell, Alfred (2008). Das letzte Geleit - vom Vorpostenboot zur U-Boot Flotte(the story of a boatmember U-984 from Heinz Sieder). Monsenstein und Vannerdat. ISBN 978-3-86582-677-0.
  • Fellgiebel, Walther-Peer (2000). Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939-1945. Friedburg, Germany: Podzun-Pallas. ISBN 3-7909-0284-5.

External links

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