emergency safe altitude

Also found in: Acronyms.

emergency safe altitude (ESA)

Altitudes depicted on approach charts, which provide at least a 1000-ft obstacle clearance in nonmountainous areas and a 2000-ft obstacle clearance in designated mountainous areas within a 100-mile radius of the navigational aid on which the procedure is based. ESA is normally used in military procedures. These altitudes are identified on published procedures as “Emergency Safe Altitudes.”
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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