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running fix[′rən·iŋ ¦fiks]
A position determined by crossing lines of position obtained at different times and advanced or retarded to a common time.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
i. A fix determined from a series of position lines based on the same object or body and resolved for a common time. In this case, one or more position lines are transferred to cut another position line at a common time to obtain a fix; the intersection of such lines is known as a running fix.
ii. A fix obtained by transferring one or more position lines to cut another position.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved