Maximum of 3 Indicated Nautical Mile horizontal range airspace coverage. Top and Bottom Antenna System minimizes airframe shadowing and provides 360-degree coverage. Detects altitude separation, trending and distance to threat between host aircraft and opposing traffic. Situational awareness is critical for avoiding mid-air collisions. Programmable Air Traffic Shield Area (ATSA™) gives the flexibility to decide airspace coverage from 1.5 miles to 3 indicated nautical miles horizontal ±500 to 5,000 feet vertical. Passive Reception for significant coverage in radar environments. Dynamic Shield automatically transitions into shield size modes for "hands off" convenience. Altitude Alert function provides an alert to the pilot prior to the arrival at an assigned altitude or inadvertent changes in cruise altitude. Modular Lightweight System Components with no additional cooling needed. Tracks up to 50 aircraft showing the three most imminent threats. N-number display of mode S equipped aircraft provides more information for best situational awareness.