Developed by the Sperry Gyroscope Company, automatic direction finders (ADF) were first installed on aircraft in the mid-1930s.
Gift of Charles L. Neumann

ID#:

2007-13184

Source:

Smithsonian's National Air and Space Museum

Copyright:

Smithsonian Institution

Rights Usage:

Contact Smithsonian Institution

Terms of Use:

Smithsonian Terms of Use

For print or commercial use please see permissions information.