airport radar service area

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airport radar service area (ARSA)

Regulatory airspace surrounding designated airports in which ATC (air traffic control) provides radar vectoring and sequencing on a full-time basis for all IFR (instrument flight rules) and VFR (visual flight rules) aircraft. ARSA service includes IFR/IFR-standard IFR separation; IFR/VFR-traffic advisories and conflict resolution; and VFR/VFR-traffic advisories and, as appropriate, safety alerts. The ARSAs are depicted on VFR aeronautical charts. The term is redundant and has been replaced by Airspace Class C.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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