How are naval jets moved around below the deck of a carrier? There are many kinds of jets on an aircraft carrier. I'm curious how they're moved around below deck. They have to be moved around for storage and to get to and from the large elevator that takes them up to and down from the flight deck.

So how are they moved? Is there some tug? Or something powering their wheels? I really hope they don't have to use their jet engines below deck, as that seems very dangerous to me.
As Simon pointed out, they use tugs. Obviously the engines are not started below the deck as it would have potentially deadly consequences. 

The tugs are either electric or powered by a diesel/JP-5 engine. For example, the USN uses the A/S32A-32 towing tractor (also called spotting dolly SD-2), among others.



Image from zone-five.net

This tug is powered by a diesel engine and controlled using a joystick. In order to be useful in the confines of the deck, the tug can rotate with a zero turning radius. The operation is pretty much similar to the other tugs- the tug is moved so that it lifts up the nosewheel, facilitating the aircraft movement.

The French, on the other hand use remotely controlled mototk tugs on board de Gaulle.



Image from mototok.com