ADS-B
What is ADS-B?
ADS-B stands for Automatic Dependent Surveillance–Broadcast. It’s one of the most important technologies in modern air traffic surveillance — and it’s changing the way aircraft are tracked around the world.
Think of it as GPS on steroids for aviation. It gives controllers and other aircraft real-time information about your position, speed, altitude, and more — all with much greater precision than traditional radar.
Here’s what each part of ADS-B means:
• Automatic: The system works without pilot input, it constantly broadcasts data.
• Dependent: It depends on onboard GPS to determine the aircraft’s position.
• Surveillance: It allows ATC and nearby aircraft to monitor your flight path.
• Broadcast: It transmits this data to anyone listening, like ATC or nearby planes.
So, instead of waiting for radar to “ping” your aircraft, you’re sending out your position automatically.
ADS-B has two main sides:
1. ADS-B Out
This is the part that sends information. It broadcasts your aircraft’s position, altitude, velocity, and identification once per second. It helps air traffic controllers track your flight and other aircraft with ADS-B in seeing you clearly on their screens
2. ADS-B In
This is the part that receives information from other aircraft and ground stations.
With ADS-B In, pilots can see: Nearby traffic; weather and NOTAMs (in some regions); airspace alerts
Why is ADS-B so smportant?
• Better Situational Awareness: Pilots can “see” nearby traffic even outside radar coverage.
• More Precise Tracking: ATC has exact aircraft positions, even in remote or oceanic areas.
• Reduced Separation: More accurate data means aircraft can fly closer together safely, improving efficiency.
• Fuel Savings and Less Delays: Smoother routing and sequencing.
• Improved Safety: Knowing exactly who’s around and where they are reduces collision risks.
ADS-B is part of the next generation of air traffic control.
It’s faster, more accurate, and more reliable than radar and it’s helping to make aviation safer and more efficient across the globe.