Our recommendation of the avionics system to be installed is the Transponder(XPDR). The Transponder located on an aircraft helps air traffic controller(ATC) to identify a specific aircraft within the controlled airspace, on the ground using secondary surveillance radar(SSR) and works together with (TCAS) to identify traffic hazards within its airspace. As the business man travels frequently, the transponder allows the pilots over a radio and speaking directly and instantaneously with air traffic control (ATC) and with other airborne pilots has enhanced safety and efficiency astronomically to ensure the business jet is flying at a smooth fly path. The Transponder model we believe is the most suited for the business jet is Rockwell Collins’ TDR-94D Transponder, it is an all solid-state, crystal-controlled receiver or transmitter specifically designed for TCAS-II-equipped business aircraft and regional airliners with 28 V DC electrical systems and limited space. It is the airborne portion of the Air Traffic Control Radar Beacon System. It also has many features and benefits such as maintainability features which helps the Transponder work with utmost efficiency. The price of this Transponder is around $10,000-$11,000 (USD).