ALL meanings of lubber line
lub·ber line
L l - noun 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. 1
- noun lubber line (navigation) A fixed line on a compass corresponding to the direction of movement. 0
- noun lubber line a mark on a ship's compass that designates the fore-and-aft axis of the vessel 0