Summary of the development of navigation aid technology for aviation.

at least three significant milestones in IFR and VFR navigation aid technology. why you choose each of the milestones.

Explain two navigational aid in use today for IFR navigation and instrument approach procedures, such as RNAV, ILS, VOR, GPS$,$ etc. Explain how the navigational aids operate and how the technology is incorporated into the modern Air Traffic Control system.

Explain why the use of navigational aid technology is important for traffic management and traffic flow in an airport.