A bit "modern" compared to the rest of the thread, but here me out.
This is the U.S.S. Wolverine. She was originally a steam-powered sidewheel pleasureboat called the Seeandbee.
She was bought up by the U.S. Navy at the beginning of WWII, given a flat top and used as a trainer aircraft carrier for the entierty of the war.
True, she never saw action, was never fitted with an elevator or hangar deck and probably didn't even leave Lake Michigan, but still---
Steam Powered
Paddlewheel.
Aircraft Carrier.