an apparatus for determining the speed of a ship, originally consisting of a float attached to a knotted line wound on a reel, the distance run out in a certain time being used as an estimate of the vessel's speed.
4
short for logarithm.
log tables
动词
1
enter (an incident or fact) in the log of a ship or aircraft or in another systematic record.
the incident has to be logged
同义词：
registerrecordmake a note ofnote downwrite downjot downbook downset downput downput in writingenterfileminutecharttabulatecatalog
2
cut down (an area of forest) in order to exploit the timber commercially.
