An instrument for measuring the speed of a ship through the water.
| 单词 | θ206019 |
| 释义 | society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > device to ascertain ship's speed through water > mechanical log (3) sillometer1841 An instrument for measuring the speed of a ship through the water. patent log1848 a mechanical device for measuring the speed of a ship. Subcategories:— vane of (1) |
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