The pilot of the other jet landed safely at Naval Air Station North Island in San Diego Bay. Both pilots were taken to medical facilities for observation. They were described as in stable condition by military officials. The cause of the crash is under investigation. No other information was immediately available. The McDonnell Douglas F/A-18 Hornet is a twin-engine supersonic, all-weather carrier-capable multirole combat jet, designed as both a fighter and attack aircraft. The F/A-18 was derived from the latter’s YF-17 in the 1970s for use by the United States Navy and Marine Corps. The aircraft has a top speed of Mach 1.8 (1,034 knots, 1,190 mph or 1,915 km/h at 40,000 ft or 12,190 m).