Dutchman's log
Any very powerful machine.
(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.
plural of polygonid
plural of diaspora
穏やかな朝、年老いた船乗りは初期の船速測定装置の使い方を披露し、小さな浮き片を海に投げ、砂時計で甲板の二点間を通過する時間を計った。
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DiQt
Free
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