Aeronautical

W5PAA Aeronautical Center Amateur Radio Club - Oklahoma City, OK

Airmobile with APRS - VHF Aircraft APRS aeronautical mobile Amateur Ham Radio info by K0RNS

Waters & Stanton - Suppliers of Amateur Radio equipment, GPS, Marine, Aeronautical, SRBR and a host of leisure related products.

MORCOM Int. - Aeronautical communications products, radio communications, weather systems

NDBfinder - NDBfinder allows you to use your PC and soundcard to receive, detect, identify and log NDBs (Non Directional Beacons used for maritime and aeronautical navigation)