flight-path deviation[′flīt ‚path dē·vē′ā·shən]
The difference between the flight track of an aircraft and the flight path, expressed in terms of either angular or linear measurement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The angular or linear difference between the track and the course of an aircraft.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved