Airport Radar Service Area (ARSA)
Airport Radar Service Area (ARSA) : (a) IFR/IFR-standard IFR separation; (b) IFR/VFR-traffic advisories and conflict resolution; and (c) VFR/VFR-traffic advisories and, as appropriate, safety alerts. The?Aeronautical Information Manual (AIM) contains an explanation of ARSA. The ARSAs are depicted on VFR aeronautical charts