lubber's line

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lubber line

also lub·ber's line  (lŭb′ərz)
n.
A line or mark on a compass that is aligned with the central axis of a moving body, especially a ship or aircraft, and represents the heading.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

lub′ber's

(or lub′ber) line`,


n.
a reference mark on a compass or other navigational instrument indicating the heading of a vessel.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lubber's line - a fixed line on a ship's compass indicating its heading
lubber line, lubber's mark, lubber's point
point of reference, reference point, reference - an indicator that orients you generally; "it is used as a reference for comparing the heating and the electrical energy involved"
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