Crew list of Ships hit by U-boats
Hjalmar Frederickson
Merchant Marine. American
Roster information listed for Hjalmar Frederickson
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | Lubrafol | Motor tanker | Fourth Engineer Officer | 9 May 1942 | U-564 (1) |
Sources
- “De Belgische Koopvaardij in de Tweede Wereldoorlog” by Roger Machielsen