English ⇄ Chinese English French Russian

North warning system
avia.	北方警戒系统
north warning system
el.	北方预警系统
space	北方预警系统 (美国北美防空防天司令部)
English thesaurus
North Warning System
abbr., scottish	NWS (USA)
avia., Canada	A system that provides airspace surveillance and command and control capability for air defence identification over the northern approaches to the continent. It consists of 15 long-range radars LRR and 39 short-range radars SRR across the Canadian Arctic and Alaska. Systems deployed on Canadian territory are operated and maintained by Canada for the North American Aerospace Defence Command NORAD on behalf of Canada and the United States.