Crew list of Ships hit by U-boats
Gustav Jonassen
Merchant Navy. Norwegian
Roster information listed for Gustav Jonassen
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | Siljestad | Motor merchant | Greaser | 15 May 1942 | U-156 |
 | Kupa | Steam merchant | Shipwrecked | 15 May 1942 | U-156 |