Definition
A live, on-screen display showing the current positions and movements of aircraft, updated continuously from surveillance data so that controllers and pilots see traffic as it actually is at that moment, rather than as a delayed or static picture.
Plain English
A screen that shows where aircraft are right now, updating as they move, so what you see matches what is actually happening in the sky.
Context Anchor
Seen in NextGen and cockpit traffic display discussions, especially when describing systems that help pilots or controllers maintain awareness of nearby aircraft.
Derivation
Real-time' means happening now, with no meaningful delay between the event and its display. The phrase came from early computing, where most data was processed in batches hours later; 'real-time' systems were the ones that kept up with events as they occurred. Applied to air traffic, it means the picture on the screen reflects the sky as it is, not as it was a few minutes ago.
Why Pilots Care
Gives pilots immediate awareness of nearby aircraft, supporting better traffic separation decisions and reducing the chance of mid-air conflicts in instrument conditions.
Analogy
It is like a moving map for nearby aircraft: useful for seeing the situation, but still dependent on the information feeding it.
Intuition Check
Do not read “real-time” as “perfectly instant” or “guaranteed complete.” It means the display is updated quickly enough to support current awareness, but there may still be small delays or aircraft that are not shown.
Example Sentence 1
ADS-B gives controllers a real-time visual representation of air traffic, showing each equipped aircraft's position as it moves through the airspace.
Example Sentence 2
NextGen improvements include a real-time visual representation of air traffic that updates faster than traditional radar alone.