patent log definition

  • noun:
    • Nautical A torpedo-shaped instrument with rotary fins which dragged from stern of a vessel to measure the speed or length traveled. Also known as screw sign, taffrail wood.
    • A taffrail wood
    • a cigar-shaped wood with rotary fins that gauge the ship's rate

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  • Definition for "patent log"
    • Nautical A torpedo-shaped instrument with rotary fins which…
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