Last Updated
：2025/12/04
Dutchman's log
Noun
historical
Japanese Meaning
船の航速を測定する初期の装置。具体的には、船員が船外に浮体を投げ、砂時計でその浮体が甲板上の2点の間を通過する時間を計り、船の速度を推定する装置。
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(nautical, historical) Any early device for measuring the speed of a moving ship, where a sailor threw a floating object overboard and used a sandglass to measure the time it took to pass between two points on deck.
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Dutchman's log
On the calm morning, the old seafarer demonstrated how to use the Dutchman's log, tossing a chip overboard and timing its passage with a sandglass.
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On the calm morning, the old seafarer demonstrated how to use the Dutchman's log, tossing a chip overboard and timing its passage with a sandglass.
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