Features

A modern codec, hugely improving quality without affecting the internet speed required
Very low latency, allowing for a reduction in simultaneous transmissions as well as more transmissions per minute
Accurate VHF simulation with blocking tones
Gain control to help normalize microphone volumes
VHF ranging algorithm to adjust radio range based on altitude and curvature of the earth
A realistic VHF network based upon real world ATC radio tower data
Voice degradation and areas of radio blackout based upon pilot's altitude and location to the radio towers
Ability for Air Traffic Controllers to cross couple or open multiple transmit and receive frequencies at once
Ability to use any frequency in the VHF spectrum for voice communications. This includes voice UNICOM