The Diamondback air-to-air missile was studied by the Naval Ordnance Test Station from 1955 to 1958. It was designed as an infrared and passive-radar guided missile powered by a storable liquid-fueled dual-thrust rocket motor. Armament options included a continuous-rod high-explosive or a low-yield (0.75 kT) nuclear warhead. Performance specifications called for a cruise speed of Mach 3 at up to 24400 m (80000 ft), and maximum range for tail attacks was to be about 25-32 km (15-20 miles). The Diamondback project was terminated before any missiles were built.