The Lark project was a high-priority, solid-fuel boosted, liquid-fueled rocket surface-to-air missile developed by the United States Navy to meet the kamikaze threat. After Lark configuration was established by the Bureau of Aeronautics in January 1945 Fairchild Aircraft was given a contract to produce 100 missiles in March 1945. Fairchild used radio command guidance with a semi-active radar homing AN/DPN-7. A backup contract for another 100 missiles was given to Convair in June 1945. Convair used beam riding guidance with AN/APN-23 active radar homing. Neither version was successful. Six of the Convair airframes were given to Raytheon to explore use of velocity-gated continuous wave doppler radar for guided missile target seekers, while most other United States investigators used range-ga