Which type of board swings up and down in the center of the boat inside the trunk?

• A. Keel
• B. Daggerboard
• C. Centerboard
• D. Leeboard

Answer: (C)

The board described is a centerboard. It’s mounted along the boat’s centerline in a trunk and is hinged so it can swing down into the water to provide lateral resistance, then swing up into the trunk to reduce draft. This central, pivoting arrangement is why it’s described as swinging up and down in the center of the boat.

Keels are fixed and don’t retract. A daggerboard also retracts, but it typically slides up and down in a trunk without swinging on a hinge. Leeboards are attached to the hull’s sides, not in a trunk at the centerline.