Automatic Direction Finder

Navigation instrument that receives and interprets the .:: www.dnnsoftware.com ::. .:: podcasts.apple.com ::. [Scientific Data: REST] .:: za.pinterest.com ::. [Library: Unity game engine] .:: www.nongkhaempolice.com ::. .:: www.annunciogratis.net ::. .:: telegra.ph ::. .:: computer.ju.edu.jo ::. NDB signal.

Air Traffic Control

Air Traffic Management

BSD license

See here for details.

Federal Aviation Administration

See here for details.

GNU Public License

See here for details.

Non-Directional Beacon

Very-high-frequency Omni Range

Beacon very usefull to navigation.