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Term: Image: Definition:
Centerboard Keel
A keel-like pivoting device, typically in a trunk, that can be lowered or raised to act as a keel.
Chine
Portion of the hull where the bottom and sides intersect (can be rounded or angled).
Cleat
Hardware piece on a boat or a dock to which lines are attached.
Coaming
A raised edge, as around the cockpit or around a hatchway, to keep water out.

Cockpit
Deck space for the crew of a boat, typically recessed.
Companionway
Entryway from the deck to the belowdeck cabin area.
Cutter
Single-masted sailboat similar to a sloop, but with the mast farther aft to allow for a double headsail.
Daggerboard
A keel-like device that is manually raised and lowered vertically without using a hinge.
Deep-V
A hull shape characterized by a sharp deadrise, typically more than 20 degrees.
Davit
A small crane used to hoist a boat or dinghy or other object.
Dinghy
A small sailboat often raced that can be sailed on and off a beach. Also a tender, either rowed or equipped with power, used to go to and from a larger vessel.
Direct Drive
An engine configuration in which the drive shaft runs in a straight driveline through the bottom of the hull.
Draft
Vertical distance a boat penetrates the water.
Fiberglass
Fiberglass
Fin Keel
A keel shaped like the fin of a fish that is shorter and deeper than a full-length keel.

Deep Fin Keel
By a fin, I refer to a simple deep keel that's length is less than 50% of the hull.
Bulb Keel
A keel, usually made with a high aspect ratio foil, that contains a ballast-filled bulb at the bottom, usually teardrop shaped.
The bulb is a shoal draft fin keel. Basically, you saw off a deep fin keel and attach a torpedo shaped bulb of lead to the keel bottom.
Wing Keel
The wing is another shoal alternative to the deep fin. Instead of one bulb at the keel bottom, the wing has two bulbs laterally offset and connected via lead airplane wings. Or the wing is a thick foil of lead without bulbs.
Canting Keel
The latest and oddest in performance is the canting keel. A canting keel mounts on a hinge
Full Keel
A full keel by definition runs the length of at least 50% of the hull. The forward edge curves vertically while the aft edge often connects to a rudder.