thats basically already what they are, most aircraft carriers have at least one other level on the inside where aircraft are stored and maintained, and there is usually a big paved elevator platform to move aircraft between the flight deck and the interior hangars
If I was in the military's brain trust, I'd suggest the next logical step: a floating parking garage.
A bunch of tanks trying to deploy from a amphibious carrier, but they're stuck because one guy can't figure out how to pay his ticket.
Lol.
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Monstertruck Aircraft Carrier Carrier Carrier
thats basically already what they are, most aircraft carriers have at least one other level on the inside where aircraft are stored and maintained, and there is usually a big paved elevator platform to move aircraft between the flight deck and the interior hangars
We gotta get more ambitious than that though. 20 stories minimum.