sight reduction[′sīt ri‚dək·shən]
The information needed for establishing a line of position, derived from the use of a sextant or an octant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The process of deriving the information needed to plot a position line from an astronomical observation.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved