Heinz Sieder

Oberleutnant zur See (Crew 38)

Successes
1 ship damaged, total tonnage 7,240 GRT
3 ships a total loss, total tonnage 21,550 GRT
1 warship a total loss, total tonnage 1,300 tons

Born	28 Jun 1920		Munich
Died	2 Aug 1944	(24)	Bay of Biscay

Oblt. z. See Heinz Sieder

Ranks

1 Oct 1938		Offiziersanwärter
1 Jul 1939		Seekadett
1 Dec 1939		Fähnrich zur See
1 Aug 1940		Oberfähnrich zur See
1 Apr 1941		Leutnant zur See
1 Jan 1943		Oberleutnant zur See

Decorations

16 Nov 1942		U-boat War Badge 1939
29 Jan 1943		Iron Cross 2nd Class
28 Feb 1944		Iron Cross 1st Class
8 Jul 1944		Knights Cross

U-boat Commands

U-boat	From	To
U-984	17 Jun 1943	2 Aug 1944 (+)	5 patrols (94 days)

Oblt. z. S.Heinz Sieder on board

Heinz Sieder began his naval career in October 1938. During his officer training he served for seven months on the battleship Scharnhorst and took part in two patrols in the Atlantic.

In April 1941 he joined the U-boat force and after four months of training he became watch officer on a school boat (probably U-46) in the 26th Flotilla.

In January 1942 he became first watch officer on the newly commissioned U-440 and was on board for four patrols. He left U-440 in April 1943 (U-440 was lost a month later) and commissioned the type VIIC U-boat U-984 in June 1943.

In January 1944 he was attached to the 9th Flotilla in Brest (France) and made some patrols in the Channel and in the Atlantic. During a patrol at the end of June 1944 he torpedoed a British destroyer and four US vessels.

Sunk on or about 2 August 1944 in the English Channel south-west of Brighton, in position 50.03.732N, 00.32.398W, by unknown cause (Niestlé, McCartney 2012).

Sources

Busch, R. and Röll, H-J. (1999). German U-boat commanders of World War II.
Niestlé, A. (1998). German U-boat losses during World War II.
Rohwer, J. (1998). Axis Submarine Successes of World War Two.

Patrol info for Heinz Sieder

	U-boat	Departure		Arrival
1.	U-984	30 Dec 1943	Kiel	2 Jan 1944	Egersund		4 days
2.	U-984	4 Jan 1944	Egersund	24 Feb 1944	Brest	Patrol 1,	52 days
3.	U-984	22 May 1944	Brest	27 May 1944	Brest	Patrol 2,	6 days
4.	U-984	6 Jun 1944	Brest	10 Jun 1944	Brest	Patrol 3,	5 days
5.	U-984	12 Jun 1944	Brest	19 Jun 1944	St. Peter Port	Patrol 4,	8 days
6.	U-984	21 Jun 1944	St. Peter Port	5 Jul 1944	Brest	Patrol 4,	15 days
7.	U-984	26 Jul 1944	Brest	2 Aug 1944	Sunk	Patrol 5,	8 days
5 patrols, 94 days at sea

Ships hit by Heinz Sieder

Date	U-boat	Name of ship	Tons		Convoy
25 Jun 1944	U-984	HMS Goodson (K 480) (t.)	1,300	br
29 Jun 1944	U-984	Edward M. House (d.)	7,240	am	ECM-17
29 Jun 1944	U-984	H.G. Blasdel (t.)	7,176	am	ECM-17
29 Jun 1944	U-984	John A. Treutlen (t.)	7,198	am	ECM-17
29 Jun 1944	U-984	James A. Farrell (t.)	7,176	am	ECM-17
			30,090
4 ships sunk (22,850 tons) and 1 ship damaged (7,240 tons). Legend We have a picture of this vessel. (d.) means the ship was damaged. (t.) means the ship was a total loss (included in ships & tonnage lost).

About ranks and decorations
Ranks shown in italics are our database inserts based on the rank dates of his crew comrades. The officers of each crew would normally have progressed through the lower ranks at the same rate.