or lubber line
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.
Words nearby lubber's line
Origin of lubber's line
First recorded in 1855–65
Also called lubber's mark, lubber's point.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019