low-altitude alert system

low-altitude alert system (LAAS)

An automated function of ground radar that alerts the controller when a mode C transponder-equipped aircraft on an IFR (instrument flight rules) plan is below a predetermined safe altitude. If requested by the pilot, LAAS is also available in VFR (visual flight rules) mode C transponder-equipped aircraft. LAAS is also an acronym for local area augmentation system.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
Full browser ?