patent log









patent log


noun Nautical.

  1. any of various devices for determining the speed of a ship by means of a vaned rotor streamed at the end of a log line upon which it exerts a torsion transmitted to a registering device on board.

noun

  1. nautical any of several mechanical devices for measuring the speed of a vessel and the distance travelled, consisting typically of a trailing rotor that registers its rotations on a meterCompare chip log
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