Separation Standards

ATC rule #1: Don’t hit nuthin’. But to achieve that, there are rules and standards. Here’s a quick rundown on those so you can better understand what the controller needs.

maclawler

Wednesday, April 02, 2025 at 05:00 AM ET

Verified

Edited By: Omar Filipovic

Simulated screen showing different flights for transport and passengers with the world as a background

Key Takeaways:

Air Traffic Control's fundamental mission is to ensure constant separation of aircraft from each other, terrain, and obstacles 24/7, operating under strict guidelines primarily from FAA Order 7110.65.
ATC employs both primary (signal reflection) and secondary (transponder-based, including ADS-B and WAM) radar systems, applying different lateral separation standards (3 miles for TRACON, 5 miles for en-route) and 1000 feet vertical separation, based on radar data accuracy and refresh rates.
The FAA is undertaking an $8 billion "Radar Modernization Proposal" to upgrade 377 aging radar systems, aiming to enhance safety, efficiency, and cybersecurity, with radar identification methods like discrete beacon codes being crucial for tracking aircraft with detailed data tags.

See a mistake? Contact us.

Keeping you safe is a big deal for us—the biggest. Air Traffic Control exists to separate aircraft from each other, from terrain, and from obstacles. We work from dawn to dawn, 24/7, 365 days a year, watching the skies and making decisions that protect you in our National Airspace System (NAS).

We have tools and rules to accomplish this? That control is based on many factors, including radar procedures, non-radar procedures, rules and regulations, plus a strong infrastructure that supports each of these techniques.