High Quality Content by WIKIPEDIA articles! NASAMS (Norwegian Advanced Surface to Air Missile System) is a distributed and networked medium to long range air-defence system. NASAMS was the first surface-based application for the AIM-120 AMRAAM (Advanced Medium Range Air-to-Air Missile) and the first surface-to-air missile system in the western world with active radar guidance. The missile itself is named SL-AMRAAM (Surfaced Launched AMRAAM).