lubber's mark

lubber's line

noun Navigation.
a vertical line on the forward inner side of the bowl of a fixed compass, used as a reference mark indicating the heading of a vessel.
Also, lubber line.
Also called lubber's mark, lubber's point.


Origin:
1855–65

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
lubber's line

noun
a fixed line on a ship's compass indicating its heading 
00:10
lubber's mark is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a chattering or flighty, light-headed person.
lubber's mark

noun
a fixed line on a ship's compass indicating its heading [syn: lubber's line
WordNet® 3.0, © 2006 by Princeton University.
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