 Until the late 1990s the RNoAF ground-based air defence solution, also known as the Norwegian Solution (NORSOL), consisted of three different weapon systems; the 40mm Bofors L70 gun (controlled by the Oerlikon Contraves FCS2000 monopulse doppler tracking radar), the laser beam riding RBS 70 MANPADS system and the NASAMS.All three systems were integrated through the ARCS via field wires and radio.The ARCS maintained connection to higher echelons and ensured protection of friendly aircraft while preventing over- and underkill for all subordinate weapon systems.