lubber line

Lubber lines also help you to see windshifts when racing.

The lubber line on the compass was steady on north.

Compasses on sailboats may have additional lubber lines at forty-five degrees from the centerline.

By rotating the capsule to align the needle with the orienting marks, the course bearing could be read at the lubber line.

A 'lubber line', which can be a marking on the compass bowl or a small fixed needle indicates the ship's heading on the compass card.

The lubber line was precisely on the "SW x W" mark on the compass card, but Jackson thought, for the first time for many years, that he wanted to live.

His design featured a metal compass capsule containing a magnetic needle with orienting marks mounted into a transparent protractor baseplate with a lubber line (later called a direction of travel indicator).

The main line on the compass reads your current (close-hauled) heading and the leeward lubber line will read the bearing to your destination, regardless of whether you are on port or starboard tack.

A bearing compass is a magnetic compass mounted in such a way that it allows the taking of bearings of objects by aligning them with the lubber line of the bearing compass.

Yes, somebody had just emerged from the forward hatch and was handing his way along by the lubber lines which acted as guides and support for the non-riggers who were forced by circumstances to work on the hull.

For moving installations, such as ship and aircraft radars, the top represents the bow or nose of the ship or aircraft, i.e., its heading (direction of travel) and this is usually represented by a lubber line.

A lubber line is a fixed line on a compass binnacle or radar plan position indicator display pointing towards the front of the ship or aircraft and corresponding to the craft's centerline (being the customary direction of movement).

If you are sailing close-hauled with good trim and you notice that your bearing to the windward mark starts to drift outside the lubber line (angle becoming greater than 45 degrees) you are being headed, and should consider tacking.

First the lubber line can be adjusted so that it is aligned with the direction in which the ship travels, then the effects of permanent magnets can be corrected for by small magnets fitted within the case of the compass.

These lubber lines may be used when sailing close hauled to see if you are on the closest course to your destination, without having to add or subtract the 45 degrees every few minutes, or recalculate your required heading every time you tack.