Approximately 800 feet.
There is a flight deck on an aircraft carrier but, it is not an aircraft carrier as there are many other ships that have flight decks on them. The amphibious assault ship is a good example.
The flight deck...
90
About 80 feet.
flight deck of a US Navy aircraft carrier
It is the aircraft carrier that has a runway called a flight deck.
approximately 60 feet
60 feet
All of the risks associated with powered flight, combined with the risks of taking off from and landing on a very small flight deck which is moving at sea.
An assault ship with a flight deck may resemble an aircraft carrier, but its purpose is to deliver marines and their equipment for amphibious attacks. Many navies use assault ships, but not all of them have a flight deck. An assault ship with its own flight facilities spares the aircraft carriers from the task of carrying marine air support. An assault ship cannot operate the high-performance combat aircraft that an aircraft carrier has, but it does not need them for the job it does. An assault ship does not fight enemy ships at sea. Its purpose is to land on an enemy shore and hold it until reinforcements arrive.
The aircraft carrier was preceded by the balloon barges of the US Civil War, and the first aircraft carriers were seaplane tenders that did not launch or recover planes aboard the ship. This included the French "Foudre" in 1911. The HMS Ark Royal (1914) was a seaplane carrier that experimented with shipboard launches and recovery. The first US carrier was a converted coal ship, the Jupiter, which became USS Langley in 1920. The first aircraft carrier designed with a flight deck was the Japanese carrier "Hosho" (1922), followed by the commissioning of the British carrier HMS Hermes in 1924.
There is a lever inside the cockpit which allows the pilot to fold the wings to minimze the footprint of the aircraft when parked on the flight deck of an aircraft carrier.