A series of stealthy multi-role fighter aircraft, the Lockheed Martin F-35 Lightning II represents the current pinnacle of aviation technology and the most advanced aircraft type currently in service. Produced in three distinct variants, the F-35A is the standard variant selected for service by the US Air Force, whilst the F-35B is the short take-off and vertical landing enabled aircraft, which has been purchased by the Royal Air Force. The third variant is the F-35C, which features stronger landing gear, an arrester hook and slightly larger, folding outer wing sections, also conventionally configured for use on aircraft carriers by the US Navy and Marine Corps.