Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-small-boat-sailing-bec64fef86bd

What does a sailboat's keel or centerboard mainly do?

It provides sideways resistance so the boat can sail upwind.

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  1. It provides sideways resistance so the boat can sail upwind ✔
  2. It stores drinking water for the crew
  3. It holds the mast upright

Why: Underwater foils resist the sideways push of the sails, letting the boat make progress toward the wind.

Huh, didn't know that: Underwater foils resist the sideways push of the sails, letting the boat make progress toward the wind.

The dad joke
That keel is really keeping things on the straight and narrow.
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References

Answer: It provides sideways resistance so the boat can sail upwind. Underwater foils resist the sideways push of the sails, letting the boat make progress toward the wind.

  1. Sailing en.wikipedia.org/wiki/Sailing
    The keel and other underwater foils provide lateral resistance to the forces on the sails.
    Checked 2026-11-07.

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