RTCA DO 288:2003 Next Generation Air/ground Communication System (nexcom) Implementation Considerations: Factors And Issues To Be Considered In Planning For The Transition To Vdl Mode 3 Based Integrated Voice Data Communications In The U.s. National Airspace System Explains the current situation as well as goals and objectives for transition from analog Air/Ground (A/G) telecommunications to A/G Very High Frequency (VHF) Digital Link Mode 3 (VDL Mode 3) based in