Onboard the flight deck of the US Navy (USN) Aircraft Carrier, USS KITTY HAWK (CV 63), Aviation Boatswain's Mate Airmen (ABAN) Joshua Baker, and (ABAN) Jared Hash, remove aircraft chocks from the intake of a training aircraft engine compartment. The non-operational training aircraft is used by fire fighting teams to conduct flight deck drills. The KITTY HAWK is currently in port at Yokosuka, Japan, conducting repairs during a restricted availability period

Aircraft carriers are warships that act as airbases for carrier-based aircraft. In the United States Navy, these consist of ships commissioned with hull classification symbols CV (aircraft carrier), CVA (attack aircraft carrier), CVB (large aircraft carrier), CVL (light aircraft carrier), CVN (aircraft carrier (nuclear propulsion) and CVAN (attack aircraft carrier (nuclear propulsion). The first aircraft carrier commissioned into the United States Navy was USS Langley (CV-1) on 20 March 1922.