The Model 901 design and construction are based on the United States Federal Aviation Administration FAA-2214-a Specification.

The Signal Light Gun Model #901, is the world's first portable air traffic control signal light gun. 

The Signal Light Gun is used by more than 80 civilian and defense agencies worldwide. Established in 1998, we have over several thousand units operating in Air Traffic Control towers across the globe, 

Voice communications may be impossible. Mission requirements might demand radio silence. But controllers always have a voice with the Model 901 ATC Signal Light Gun. It is completely portable and always where you need it when you need it inside the tower or out.