
Baron Siegfried von Forstner
Korvettenkapitän (Crew 30)
| Successes 14 ships sunk for a total of 70.434 GRT 1 auxiliary warship sunk for a total of 602 GRT 3 ships damaged for a total of 28.682 GRT |
| Born | 19 Sep, 1910 | Hannover |
| Died | 13 Oct, 1943 | North Atlantic |
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Ranks
Decorations
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U-boat Commands
| U-59 | 11 Nov, 1940 | - | 16 Apr, 1941 | No war patrols |
| U-402 | 21 May, 1941 | - | 13 Oct, 1943 (+) | 8 patrols (349 days) |
Personal information
![]() In the wardroom of U-402, cruising at 100 feet, Siegfried Frhr. von Forstner celebrates the news of his Knights Cross decoration. |
Siegfried Freiherr von Forstner began his naval career in April 1930. Later he served for more than two years on the light cruiser Nürnberg, including six patrols during the first year of the war. In April 1940 he transferred to the U-boat force. After the usual training he served on U-99 under Kptlt. Kretschmer for one patrol as Kommandantenschüler (Commander-in-training).
After a few months on the training boat U-59, in April 1941he commissioned U-402, a Type VIIC boat. He operated mostly against convoys in the North Atlantic and became one of the most successful commanders in 1943. U-402 was sunk on 13 October, 1943 by an aircraft from US escort carrier USS Card and was lost with all hands.
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-402 | 26 Oct, 1941 | Kiel | 9 Dec, 1941 | St. Nazaire | Patrol, | 45 days |
| 2. | U-402 | 11 Jan, 1942 | St. Nazaire | 11 Feb, 1942 | St. Nazaire | Patrol, | 32 days |
| 3. | U-402 | 26 Mar, 1942 | St. Nazaire | 20 May, 1942 | St. Nazaire | Patrol, | 56 days |
| 4. | U-402 | 16 Jun, 1942 | St. Nazaire | 5 Aug, 1942 | La Pallice | Patrol, | 51 days |
| 5. | U-402 | 4 Oct, 1942 | La Pallice | 20 Nov, 1942 | La Pallice | Patrol, | 48 days |
| 6. | U-402 | 14 Jan, 1943 | La Pallice | 23 Feb, 1943 | La Pallice | Patrol, | 41 days |
| 7. | U-402 | 21 Apr, 1943 | La Pallice | 26 May, 1943 | La Pallice | Patrol, | 36 days |
| 8. | U-402 | 4 Sep, 1943 | La Pallice | 13 Oct, 1943 | Sunk | Patrol, | 40 days |
| 8 patrols, 349 days at sea | |||||||
Ships hit by Baron Siegfried von Forstner
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 16 Jan, 1942 | U-402 | Llangibby Castle | 11.951 | | br | WS-15 | damaged |
| 13 Apr, 1942 | U-402 | Empire Progress | 5.249 | | br | ON-80 | |
| 30 Apr, 1942 | U-402 | Ashkhabad | 5.284 | | sj | ||
| 2 May, 1942 | U-402 | USS Cythera (PY 26) | 602 | | am | ||
| 2 Nov, 1942 | U-402 | Dalcroy | 4.558 | | br | SC-107 | |
| 2 Nov, 1942 | U-402 | Empire Antelope | 4.945 | | br | SC-107 | |
| 2 Nov, 1942 | U-402 | Empire Leopard | 5.676 | | br | SC-107 | |
| 2 Nov, 1942 | U-402 | Empire Sunrise | 7.459 | | br | SC-107 | damaged |
| 2 Nov, 1942 | U-402 | Rinos | 4.649 | | gr | SC-107 | |
| 7 Feb, 1943 | U-402 | Afrika | 8.597 | | br | SC-118 | |
| 7 Feb, 1943 | U-402 | Daghild | 9.272 | | nw | SC-118 | damaged |
| 7 Feb, 1943 | U-402 | Henry R. Mallory | 6.063 | | am | SC-118 | |
| 7 Feb, 1943 | U-402 | Kalliopi | 4.965 | | gr | SC-118 | |
| 7 Feb, 1943 | U-402 | Robert E. Hopkins | 6.625 | | am | SC-118 | |
| 7 Feb, 1943 | U-402 | Toward | 1.571 | | br | SC-118 | |
| 8 Feb, 1943 | U-402 | Newton Ash | 4.625 | | br | SC-118 | |
| 11 May, 1943 | U-402 | Antigone | 4.545 | | br | SC-129 | |
| 11 May, 1943 | U-402 | Grado | 3.082 | | nw | SC-129 | |
| 99.718 | |||||||
* Unless otherwise noted the ships listed here were sunk. | |||||||
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Decorations and ranks information is in many cases not complete. If you can help on any of those missing that would be great.



