Definition
NAT refers to the North Atlantic airspace region between North America and Europe, where a structured system of oceanic routes and procedures is used to manage the high volume of long-range traffic crossing the ocean. Because there is no radar coverage over most of this airspace, aircraft are separated by published procedures, time, altitude, and lateral spacing rather than by direct controller surveillance.
Plain English
The North Atlantic is the patch of ocean airspace between North America and Europe. Lots of airliners cross it every day, but there are no radar stations out there, so traffic is organised onto set tracks and kept apart by careful planning instead of live radar.
Context Anchor
Seen in off-airway and oceanic route discussions, especially when planning or flying long overwater flights across the North Atlantic.
Why Pilots Care
Following NAT procedures ensures proper aircraft separation and reliable communication in remote airspace where radar coverage is limited.
Intuition Check
NAT does not mean a single airway or one fixed route. Here it identifies the North Atlantic area and the route system used for flights across it.
Example Sentence 1
The crew reviewed the day's NAT track message before filing their flight plan from New York to London.
Example Sentence 2
Weather updates prompted a change to an adjacent NAT route before departure.