Crew list of Ships hit by U-boats
Joseph Leo Potoski
USNR (8203187). American
Roster information listed for Joseph Leo Potoski
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | USS Block Island (CVE 21) | Escort carrier | Aviation Machinist's Mate Third Class | 29 May 1944 | U-549 |