Daily Almanac for
Nov 30, 2009
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par'allel rul'ers




a pair of straightedges connected by two pivoted crosspieces of equal length so as to be parallel at all times, used for various navigational purposes, esp. for transferring the bearing of a plotted course to a compass rose.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

parallel projectionparallel sailing
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