Which board is pushed or pulled almost straight up and down in a trunk?

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

Answer: (B)

Daggerboards are designed to slide in a vertical channel called a trunk, so you can push or pull them nearly straight up and down. This vertical movement lets you raise the board to reduce depth and drag when needed (like in shallow water or for beaching) and lower it to add lateral resistance for upwind stability. The other options don’t fit that vertical, trunk-guided behavior: a centerboard usually pivots or rotates down from the hull, leeboards drop from the sides of the hull, and a keel is fixed and does not move.