Crew list of Ships hit by U-boats
Karl Johan Martinsen
Merchant Navy. Norwegian
| Born | 11 Apr 1892 | Oslo | |
| Died | 17 Mar 1942 | (49) |
Roster information listed for Karl Johan Martinsen
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | Ranja | Motor tanker | Oiler | 17 Mar 1942 (+) | U-71 (1) |