Ships in the 18th century Royal Navy had the underside of their hulls fitted with copper plate. Ships at that time were made of planks of wood nailed together and that caused "drag" as it moved through the water, slowing them down. They were also prone to fouling with barnacles and seaweed. The use of copper plate stopped fouling and smoothed the hull and so made the ships fast. The best!
By SailingQuiz September 2019 Category: Nautical Saying
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What does Copper bottom mean?
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Definition of the nautical phrase "Copper bottom".