sight reduction

sight reduction

[′sīt ri‚dək·shən]
(navigation)
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.

sight reduction

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
References in periodicals archive ?
From the basics of coordinates, to sun sight reductions and lunar distance sights, to sextant adjustments and altitude corrections, and an exhaustive wealth of appendices, Celestial Navigation in the GPS Age is an absolute "must-have" for offshore navigators and a readily accessible self-teaching tool.
Hilaire Method of navigation; sun sight reductions; sights of other celestial bodies; special sights; lunar distance sights; the attitude observations; sextant checks and adjustments; operations at sea; insights from the navigation triangle; and concludes with exercises to reinforce understanding and build confidence.