Definition
An ATC procedure permitting simultaneous instrument approaches to parallel runways whose centerlines are separated by at least 3,000 feet (or less where authorized), conducted with no required radar separation between aircraft on adjacent final approach courses. Each approach is monitored by a dedicated final monitor controller, and a No Transgression Zone (NTZ) is established between the final approach courses to ensure safe lateral separation.
Plain English
Two aircraft fly approaches to two parallel runways at the same time, on separate approach paths, without ATC keeping a fixed distance between them. A controller watches each path closely and a protected strip of airspace sits between them so the aircraft stay safely apart.
Context Anchor
Seen in instrument flying and ATC procedures at airports with parallel runways, especially when approach control is using both runways at the same time in poor weather or busy traffic periods.
Derivation
‘Independent’ here means the two approaches are run independently of each other — ATC does not have to keep the aircraft separated from each other by radar distance because the runway spacing and monitoring procedures provide the separation.
Why Pilots Care
Enables higher arrival rates at busy airports with parallel runways while maintaining safety.
Analogy
Think of two cars driving in separate marked lanes on the same road. They can move side by side safely because each stays in its own lane; if one starts crossing the line, action is needed right away.
Intuition Check
Do not read independent as meaning “free from ATC control.” Here, independent means the adjacent approaches can run at the same time without normal aircraft-to-aircraft spacing between the two final approach paths, as long as each aircraft stays on its assigned path.
Example Sentence 1
Atlanta Approach advised the crew to expect simultaneous independent approaches to runways 27L and 27R.
Example Sentence 2
During peak traffic, simultaneous independent approaches allow the airport to handle more arrivals without increasing delays.