taffrail log

taffrail log
A mechanical device dragged from the stern of the vessel that indicates the vessels speed through the water; usually consists of a propeller, a reading unit and a stiff line connecting them.

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  • taffrail log — noun a cigar shaped log with rotary fins that measure the ship s speed • Syn: ↑patent log, ↑screw log • Hypernyms: ↑log * * * noun : a log that is mounted on the taffrail of a ship and consists of a rotator, log line, and recording device co …   Useful english dictionary

  • Taffrail — A Taffrail is the aftermost railing around the stern of a ship, often, but not always, ornately carved. A taffrail log is an object dragged from the stern of the vessel to calculate the vessel s speed through the water. External references *… …   Wikipedia

  • log — Synonyms and related words: Domesday Book, Mach meter, accelerometer, account book, accounts payable ledger, accounts receivable ledger, address book, adversaria, album, anemometer, annals, annual, appointment calendar, appointment schedule,… …   Moby Thesaurus

  • Pitometer log — Pitometer logs (also known as pit logs) are devices used to measure a ship s speed relative to the water. They are used on both surface ships and submarines. Data from the pitometer log is usually fed directly into the ship s navigation… …   Wikipedia

  • screw log — noun a cigar shaped log with rotary fins that measure the ship s speed • Syn: ↑patent log, ↑taffrail log • Hypernyms: ↑log * * * Naut. See patent log …   Useful english dictionary

  • harpoon log — noun a cylindrical log with a device that registers distance • Hypernyms: ↑log * * * noun : a log consisting of a rotator and a distance registering device combined in a cylindrical case and towed astern compare taffrail log …   Useful english dictionary

  • patent log — noun a cigar shaped log with rotary fins that measure the ship s speed • Syn: ↑screw log, ↑taffrail log • Hypernyms: ↑log …   Useful english dictionary

  • patent log — noun A taffrail log …   Wiktionary

  • taffraillog — taffrail log n. See patent log. * * * …   Universalium

  • anemometer — Synonyms and related words: Mach meter, accelerometer, anemograph, anemometrograph, anemoscope, cock, ground log, harpoon log, log, log line, patent log, speedometer, tachometer, taffrail log, vane, weather vane, weathercock, wind cone, wind… …   Moby Thesaurus

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