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chip log

noun

, Nautical.
  1. a log for measuring the speed of a vessel.


chip log

noun

  1. nautical a log for determining a vessel's speed, consisting of a wooden chip tossed overboard at the end of a line that is marked off in lengths of 47 feet 3 inches; the speed is calculated by counting the number of such intervals that pass overboard in a 28-second interval
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of chip log1

First recorded in 1825–35
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Example Sentences

The chip log consists of a reel, line, toggle and chip.

The principle of the chip log is that each division of the log line bears the same ratio to a nautical mile that the log glass does to the hour.

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