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lubber's line

 

Definitions from WordNet

Noun lubber's line has 1 sense
  1. lubber's line, lubber line, lubber's mark, lubber's point - a fixed line on a ship's compass indicating its heading
    --1 is a kind of reference point, point of reference, reference

Definitions from the Web

Lubber's Line

Definition: Lubber's line refers to a fixed reference line on a navigation instrument, such as a sextant or a telescope, used to assist in measuring the angular distances between celestial bodies or landmarks.

Part of Speech: Noun

Sense 1: A fixed reference line on a sextant or telescope.

Example sentence 1: The sailor adjusted the position of the celestial body so that it aligned perfectly with the lubber's line before taking the navigational measurement.

Sense 2: A fixed reference line on a compass for land navigation.

Example sentence 2: The hiker set his compass's lubber's line to the north to stay on the correct path during the trek.

Sense 3: A reference line used in aircraft navigation.

Example sentence 3: The pilot carefully positioned the aircraft's lubber's line to accurately determine the heading while flying over the vast ocean.

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