Gander Automated Air Traffic System

Gander Automated Air Traffic System (GAATS) is a proprietary system of Nav Canada used for the oceanic airspace of the Gander Area Control Center (ACC).

Most of the airspace is not monitored by radar, so procedures differ from those in continental airspaces. GAATS is an oceanic air traffic management system that automatically interacts with air traffic controllers with a radar-like picture of traffic in oceanic airspace. GAATS also provides automatic waypoint reports, and use of Controller Pilot Data Link Communications (CPDLC) which is text-based messaging for such routine requests. GAATS brings significant safety and efficiency to North Atlantic airspace.

North Atlantic airspace is the busiest oceanic airspace in the world with about 1,300 flights a day, most of which are large commercial carriers. More than half of the flights follow the North Atlantic Tracks but about 40% are ‘random’, as well as rescue and others. Nav Canada shares control of this airspace with icts United Kingdom counterpart, the National Air Traffic Services (NATS).

The GAATS technology is now used by NATS ‘ Shanwick Oceanic Control – called SAATS – with NAV CANADA and the UK ANS provider collaborating on flight management for the entire North Atlantic airspace.

The Gander ACC (“Gander Center”, CZQX) is responsible for controlling aircraft in the western half of the North Atlantic oceanic airspace. The Gander oceanic airspace is bounded to the north by the Icelandic Control Center , on the east by the Prestwick, Scotland , Control Center, to the south by the Portuguese control center in the Azores , and finally to the southwest by the New York Air Route Traffic Control Center .

GAATS traffic management capabilities are achieved through the tight integration between air traffic, airspace and weather models. Operational flexibility and workload balancing are further enhanced through dynamic sectorization.

Specifically, GAATS gives controllers increased situational awareness by having a view of the aircraft positions, much as a radar controller would. Among the many features available, controllers can use this new computing and display power to view projected routes and their timelines, and to help avoid potential conflicts.


  • GAATS Brochure
  • ARINC waypoint communications
  • ATC Technology over the North Atlantic

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