| Born | 22 Dec, 1914 | Habelschwerdt, Silesia |
| Died | 19 Dec, 1997 |
|
Ranks
Decorations |
U-boat Commands
| U-143 | 19 Nov, 1941 | - | 7 Apr, 1942 | No war patrols |
| U-758 | 5 May, 1942 | - | 3 Apr, 1944 | 5 patrols (207 days) |
| U-3002 | 6 Aug, 1944 | - | 24 Sep, 1944 | No war patrols |
| U-3007 | 22 Oct, 1944 | - | 24 Feb, 1945 | No war patrols |
| U-3008 | Mar, 1945 | - | 8 May, 1945 | No war patrols |
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-758 | 14 Nov, 1942 | Kiel | 24 Dec, 1942 | St. Nazaire | Patrol, | 41 days |
| 2. | U-758 | 14 Feb, 1943 | St. Nazaire | 30 Mar, 1943 | Bordeaux | Patrol, | 45 days |
| 3. | U-758 | 15 May, 1943 | Bordeaux | 16 May, 1943 | Bordeaux | 2 days | |
| 4. | U-758 | 26 May, 1943 | Bordeaux | 25 Jun, 1943 | St. Nazaire | Patrol, | 31 days |
| 5. | U-758 | 1 Sep, 1943 | St. Nazaire | 24 Oct, 1943 | Lorient | Patrol, | 54 days |
| 6. | U-758 | 16 Dec, 1943 | Lorient | 20 Jan, 1944 | St. Nazaire | Patrol, | 36 days |
| 5 patrols, 207 days at sea | |||||||
Ships hit by Helmut Manseck
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 17 Mar, 1943 | U-758 | James Oglethorpe | 7.176 |  | am | HX-229 | |
| 17 Mar, 1943 | U-758 | Zaanland | 6.813 |  | nl | HX-229 | |
| 13.989 | |||||||
* Unless otherwise noted the ships listed here were sunk. | |||||||
Decorations and ranks information is in many cases not complete. If you can help on any of those missing that would be great.