The escort carrier or escort aircraft carrier, also called a "jeep carrier" or "baby flattop" in the United States Navy (USN) or "Woolworth Carrier" by the Royal Navy, was a small and slow type of aircraft carrier used by the Royal Navy, the Royal Canadian Navy, the United States Navy, the Imperial Japanese Navy and Imperial Japanese Army Air Force in World War II. They were typically half the length and a third the displacement of larger fleet carriers, slower, more-lightly armed and armored, and carried fewer planes. Escort carriers were most often built upon a commercial ship hull, so they were cheaper and could be built quickly. This was their principal advantage as they could be completed in greater numbers as a stop-gap when fleet carriers were scarce. However, the lack of protection made escort carriers particularly vulnerable, and several were sunk with great loss of life. The light carrier was a similar concept to the escort carrier in most respects, but was fast enough to operate alongside fleet carriers.
Five ships of the Royal Navy have borne the name HMS Ark Royal:
HMS Ark Royal was an aircraft carrier of the Royal Navy that was operated during the Second World War.
A seaplane tender is a boat or ship that supports the operation of seaplanes. Some of these vessels, known as seaplane carriers, could not only carry seaplanes but also provided all the facilities needed for their operation; these ships are regarded by some as the first aircraft carriers and appeared just before the First World War.
A light aircraft carrier, or light fleet carrier, is an aircraft carrier that is smaller than the standard carriers of a navy. The precise definition of the type varies by country; light carriers typically have a complement of aircraft only one-half to two-thirds the size of a full-sized fleet carrier. A light carrier was similar in concept to an escort carrier in most respects, however light carriers were intended for higher speeds to be deployed alongside fleet carriers, while escort carriers usually defended equally slow convoys and provided air support during amphibious operations.
HMS Indomitable was a modified Illustrious-class aircraft carrier built for the Royal Navy during World War II. Originally planned to be the fourth of the class, she was redesigned to enable her to operate more aircraft, 48 instead of 36. A second hangar was added above the original, raising the flight deck by 14 feet (4.3 m), although the hangar-side armour had to be reduced to compensate. The lower hangar was made shorter than the upper hangar due to the need for extra workshops and accommodation to support the added aircraft.
The flight deck of an aircraft carrier is the surface from which its aircraft take off and land, essentially a miniature airfield at sea. On smaller naval ships which do not have aviation as a primary mission, the landing area for helicopters and other VTOL aircraft is also referred to as the flight deck. The official U.S. Navy term for these vessels is "air-capable ships".
The Illustrious class was a class of aircraft carrier of the Royal Navy that included some of the most important British warships in the Second World War. They were laid down in the late 1930s as part of the rearmament of British forces in response to the emerging threats of Nazi Germany, Fascist Italy and Imperial Japan.
HMS Eagle was an Audacious-class aircraft carrier of the Royal Navy, in service 1951–1972. Until the arrival of the Queen Elizabeth-class aircraft carriers in the 21st century, she and her sister Ark Royal were the two largest Royal Navy aircraft carriers ever built.
HMS Ark Royal (R09) was an Audacious-class aircraft carrier of the Royal Navy and, when she was decommissioned in 1979, was the Royal Navy's last remaining conventional catapult and arrested-landing aircraft carrier. She was the first aircraft carrier to be equipped with angled flight deck at its commissioning; her sister ship, HMS Eagle, was the Royal Navy's first angle-decked aircraft carrier after modification in 1954. Ark Royal was the only non-United States vessel to operate the McDonnell Douglas Phantom at sea.
The Centaur class aircraft carrier was the final iteration of the 1942 Design Light Fleet Carrier developed by the United Kingdom for the Royal Navy during the Second World War. They were designed in 1943 to operate higher-performance aircraft than the preceding Majestic-class aircraft carrier. Four ships were laid down in 1944-1945 and completed in 1953-1959. Rapid developments in carrier warfare and technology overtook the ships even as they were under construction, and the associated costs of modernization led to ships being completed to different specifications. Only the last ship, HMS Hermes (R12), was fitted as a modern fixed-wing carrier; she was also the last of the class to retire in 2017 as INS Viraat.
The 1942 Design Light Fleet Carrier, commonly referred to as the British Light Fleet Carrier, was a light aircraft carrier design created by the Royal Navy during the Second World War, and used by eight naval forces between 1944 and 2001. They were designed and constructed by civilian shipyards to serve as an intermediate step between the expensive, full-size fleet aircraft carriers and the less expensive but limited-capability escort carriers.
CVA-01 was a proposed United Kingdom aircraft carrier, designed during the 1960s. The ship was intended to be the first of a class that would replace all of the Royal Navy's carriers, most of which had been designed before or during the Second World War. CVA-01 and CVA-02 were intended to replace HMS Victorious and HMS Ark Royal, while CVA-03 and CVA-04 would have replaced HMS Hermes and HMS Eagle respectively.
HMS Furious was a modified Courageous-class battlecruiser built for the Royal Navy (RN) during the First World War. Designed to support the Baltic Project championed by the First Sea Lord, Lord Fisher, the ship was very lightly armoured and designed with a main battery of only two 18-inch guns. Furious was modified as an aircraft carrier while under construction. Her forward turret was removed and a flight deck was added in its place, such that aircraft had to manoeuvre around the superstructure to land. Later in the war, the ship had her rear turret removed and a second flight deck installed aft of the superstructure, but this was less than satisfactory due to air turbulence. Furious was briefly laid up after the war before she was reconstructed with a full-length flight deck in the early 1920s.
HMS Argus was a British aircraft carrier that served in the Royal Navy from 1918 to 1944. She was converted from an ocean liner that was under construction when the First World War began and became the first aircraft carrier with a full-length flight deck that allowed wheeled aircraft to take off and land. After commissioning, the ship was involved for several years in the development of the optimum design for other aircraft carriers. Argus also evaluated various types of arresting gear, general procedures needed to operate a number of aircraft in concert and fleet tactics. The ship was too top-heavy as originally built, and had to be modified to improve her stability in the mid-1920s. She spent one brief deployment on the China Station in the late 1920s before being placed in reserve for budgetary reasons.
An anti-submarine warfare carrier is a type of small aircraft carrier whose primary role is as the nucleus of an anti-submarine warfare hunter-killer group. This type of ship came into existence during the Cold War as a development of the escort carriers used in the ASW role in the North Atlantic during World War II.
The Malta-class aircraft carrier was a British large aircraft carrier design of World War II. Four ships were ordered in 1943 for the Royal Navy, but changing tactical concepts, based on American experience in the Pacific War, caused repeated changes to the design, which was not completed before the end of the war. All four ships were cancelled in 1945 before they were laid down.
An armoured flight deck is an aircraft carrier flight deck that incorporates substantial armour in its design.
Aircraft carriers are warships that evolved from balloon-carrying wooden vessels into nuclear-powered vessels carrying scores of fixed- and rotary-wing aircraft. Since their introduction they have allowed naval forces to project air power great distances without having to depend on local bases for staging aircraft operations.
Royal Navy 
