North Warning System

North Warning System
Active	1988–present
Country	Canada & United States
Branch	Royal Canadian Air Force United States Air Force
Type	Early-warning radar
Role	Continental Air Defense
Part of	North American Aerospace Defense Command
Garrison/HQ	CFB North Bay Joint Base Elmendorf-Richardson

The North Warning System (NWS, French: Système d'alerte du nord) is a joint United States and Canadian early-warning radar system for the atmospheric air defense of North America. It provides surveillance of airspace from potential incursions or attacks from across North America's polar region. It replaced the Distant Early Warning Line system in the late 1980s.