(also lubber line)
A line marked on the compass in a ship or aircraft, showing the direction straight ahead.
More example sentences
- Adjustable compasses have a compass body with a lubber's line and a rotating capsule or bezel with a boxing mark.
- Simple compasses may use north or 0º on the azimuth circle as a lubber's line.
Definition of lubber's line in:
- The British & World English dictionary