Anti-aircraft or artillery ship
|The following is based on content cut from Red Alert 2 and has not been confirmed by canon sources.|
Although small, Hydrofoils can be seen in the Red Alert 2 intro among fleets of Dreadnoughts. They both fire their missiles, so the Hydrofoil can be considered either an anti-aircraft or an artillery ship. Along with the Corkscrew transport, it proves that the intro was rendered some time before the final game was completed.