Vindictive's return to a surface-combat role may have been unique

Was HMS Vindictive the only aircraft carrier converted back into a surface combatant?

The panel tentatively thinks so; Langley's later seaplane-carrier conversion is treated as a different case.

The panel tentatively identifies HMS Vindictive as the only aircraft carrier converted back into a surface combatant. That is a recollection, rather than a claim based on an exhaustive list of conversions. Langley is considered as a comparison. Its later conversion produced a seaplane carrier, so it does not fit the same category.