You just need to use your VHF or HF receiver to listen to positions reported by pilots to ATCs, and then enter them in an easy-to-understand syntax. Instantaneously, AirNav will track the planes on a map created by the program.
The program features a multi-window tracking capacity; every window is resizable and you can open as many maps or vertical tracking windows as you want. This lets you see traffic simultaneously in many zooms, enabling you to get a complete overview of what is passing in the skies around the world.
AirNav also maintains an highly detailed database of All Heard Flights, in HF, VHF, and ACARS. You can join all your logs from different sources and merge them into a table.
Note: this program is not a game.