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The list of ship commissionings in 1948 includes a chronological list of all ships commissioned in 1948.
| Date | Operator | Ship | Class and type | Pennant | Other notes |
|---|---|---|---|---|---|
| 28 May |  Royal Netherlands Navy
|
Karel Doorman | Colossus-class aircraft carrier | R81 | Former HMS Venerable[1] |
| 27 October |  United States Navy
|
Cabot | Independence-class aircraft carrier | CVL-28 | Recommissioned from reserve |
| November |  U.S. Fish and Wildlife Service
|
Dennis Winn | Cargo liner | Former U.S. Army Lt. Walter J. Will (FS-244) | |
 Royal Navy
|
Warrior | Colossus-class aircraft carrier | R31 | Former HMCS Warrior | |
| 16 December |  Royal Australian Navy
|
Sydney | Majestic-class aircraft carrier | R17 | Former HMS Terrible |