This was a series of similar tankers, built in the late 1950s by National Bulk Carriers, Kure Shipbuilding Division, Kure, Japan.
| Ship | Hull# | Built | GRT | DWT | Length | Beam | Comments |
|---|---|---|---|---|---|---|---|
| Petro Sea | 61 | 1956 | 26,035 | 43,927 | 712’3″ | 97’3″ | New class of large tankers. |
| Petrolene | 62 | 1957 | 26,035 | 43,845 | 712’3″ | 97’4″ | Renamed Commonwealth 1964, renamed Petro Pan 1970. |
| Edward L. Steiniger | 69 | 1958 | 26,216 | 43,805 | 712’3″ | 97’4″ | Another like Petro Sea (hull #61). |
