taffrail log

taffrail log

English

Noun

taffrail log (plural taffrail logs)

1. (nautical) A mechanical device dragged from the stern of the vessel that indicates the vessel's speed through the water; usually consists of a propeller, a reading unit and a stiff line connecting them.

Synonyms

• patent log

Translations

nautical speed measuring device

Finnish: laahusloki, patenttiloki

Russian: вертушечный лаг (vertušečnyj lag), гакабортный буксируемый лаг (gakabortnyj buksirujemyj lag)

See also

• chip log