Helicarrier

The Helicarrier, an aircraft carrier specifically designed to be itself capable of independent powered flight in addition to the standard functions of aircraft carriers, is the world headquarters and signature capital ship of the international peacekeeping agency SHIELD.

History
he Helicarrier is a seaworthy ship capable of VTOL flight by way of four huge lift fans mounted on the sides. It has two runways, one with direct access to a hangar at the rear is aligned along the spine of the vessel and is used for forward launches of aircraft, and the other diagonally aligned runway above is suitable for landings. The Helicarrier was heavily damaged in an attack, yet was still able to limp to open water on the strength of only three of its colossal fans.