The F-35B short takeoff/vertical landing (STOVL) variant is the world’s first supersonic STOVL stealth aircraft. It is designed to operate from austere bases and a range of air-capable ships near front-line combat zones. It can also take off and land conventionally from longer runways on major bases. The U.S. Marine Corps' F-35B aircraft reached initial operational capability (IOC) on July 31, 2015, when a squadron of 10 F-35Bs was declared ready for world-wide deployment.