lag error
lag error (altimeter)
An error in a pressure altimeter when height changes are very rapid. The altimeter lags behind the actual height—the altimeter overreads in a rapid descent and underreads in a very rapid climb. The higher the rate of change, the higher the error. The error is not as prominent in rapid climb.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved