After the creation of the U.S. Air Force as a separate service in 1947, Army Aviation continued to a degree that warranted a new badge for Army Aviators (who piloted light observation and liaison airplanes and helicopters). The result was the creation of the Army Aviator Badge, which is a modified version of the U.S. Air Force Pilot Badge. It comes in three grades: Basic, Senior (7 years’ service and 1,000 flight hours), and Master (15 years’ service and 2,000 flight hours).[3] The Aviator and Senior Aviator Badges were approved on 27 July 1950 and the Master Aviator Badge was approved on 12 February 1957.