| Born | 25 Feb, 1917 | Kandy, Ceylon |
| Died | 15 May, 1943 | North Atlantic |
|
Ranks
Decorations |
U-boat Commands
| U-222 | 23 May, 1942 | - | 2 Sep, 1942 | No war patrols |
| U-266 | 12 Sep, 1942 | - | 15 May, 1943 (+) | 2 patrols (90 days) |
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-266 | 22 Dec, 1942 | Kiel | 17 Feb, 1943 | St. Nazaire | Patrol, | 58 days |
| 2. | U-266 | 14 Apr, 1943 | St. Nazaire | 15 May, 1943 | Sunk | Patrol, | 32 days |
| 2 patrols, 90 days at sea | |||||||
Ships hit by Ralf von Jessen
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 6 Feb, 1943 | U-266 | Polyktor | 4.077 |  | gr | SC-118 | |
| 5 May, 1943 | U-266 | Bonde | 1.570 |  | nw | ONS-5 | |
| 5 May, 1943 | U-266 | Gharinda | 5.306 |  | br | ONS-5 | |
| 5 May, 1943 | U-266 | Selvistan | 5.136 | | br | ONS-5 | |
| 16.089 | |||||||
* 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.