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Explanation: "dérive" is "daggerboard" on this boat if you're talking about the floats.
What's the difference, I hear you cry? A centerboard is basically an unballasted keel that can be swung up to enhance performance of reduce draft. The daggerboard does the same job but it slides up and down in its housing.
(Many of these boats are opting for foils rather than daggerboards...)
Experience working in a sail loft, and working for naval architects