| Born | 10 Feb, 1906 | Berlin |
| Died | 22 Jun, 1940 | North Sea / Bay of Biscay |
|
Ranks
Decorations |
U-boat Commands
| U-9 | 21 Aug, 1935 | - | 1936/37 | No war patrols |
| U-23 | 1936/37 | - | 30 Sep, 1937 | No war patrols |
| U-28 | 1936/37 | - | 30 Sep, 1937 | No war patrols |
| U-122 | 30 Mar, 1940 | - | 22 Jun, 1940 (+) | 2 patrols (14 days) |
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-122 | 16 May, 1940 | Kiel | 19 May, 1940 | Trondheim | Patrol, | 4 days |
| 2. | U-122 | 21 May, 1940 | Trondheim | 24 May, 1940 | Wilhelmshaven | 4 days | |
| 3. | U-122 | 24 May, 1940 | Wilhelmshaven | 25 May, 1940 | Kiel | 2 days | |
| 4. | U-122 | 13 Jun, 1940 | Kiel | 22 Jun, 1940 | Sunk | Patrol, | 10 days |
| 2 patrols, 14 days at sea | |||||||
Ships hit by Hans-Günther Looff
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 20 Jun, 1940 | U-122 | Empire Conveyor | 5.911 |  | br | ||
| 5.911 | |||||||
* 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.