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Term: Image: Definition:
Aft
The back part of a ship or boat
Amidship
The middle part of a ship or boat.
Anchor
An anchor is a heavy item that is dropped down into the water, touching the bottom of the body of water and securing the vessel. Usually, the anchor is made up of a ring at one end for attaching the l More ...
Anti-fouling paint
A special paint applied to a boat's hull to prevent marine growth.
Astern
The direction toward or beyond the stern.
Backstay
A support for the mast to keep it from falling forward.
Beam
The widest part of a ship from one side to the other.
Berth
A place to sleep aboard a boat. Also, a boat slip.
Bilge
The bottom inside part of a ship where dirty water collects.
Bimini Top
A canvas cover over the helm or cockpit area
Bitt
Vertical post extending above the deck to secure docking lines.
Blade
one of the flat parts of a propeller that spins around and pushes a boat forward.
Boom
A long pole fixed to the bottom of a boat’s sail, that is used for changing the direction of the sail.
Bow
The front part of a ship or boat.
Bow Eye
A stainless steel U-bolt on a boat's bow stem used to secure tow lines or trailer winch hooks.
Bowsprit
A long pole that sticks out from the front of a ship.
Bridge
The part of a ship from which it is controlled.
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 kee
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Canting Keel
The latest and oddest in performance is the canting keel. A canting keel mounts on a hinge
Capstan
A winch used for hauling heavy objects such as anchors.
Catamaran
A twin hulled boat, either power or sail.
Catboat
Small, simple sailboat with one mast and sail set far forward.
Center Console Boat
Fishing boat with the helm station located amidships for maximum walk-through space around the perimeter of the boat.
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).
Clam Shell Vent
clamshell vents are commonly used to vent bilges or as intake air supplements for active vents.
Cleat
Hardware piece on a boat or a dock to which lines are attached.
Coach Roof
The roof of the cabin on a small boat.
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.
Davit
A small crane used to hoist a boat or dinghy or other object.
Deep Fin Keel
By a fin, I refer to a simple deep keel that's length is less than 50% of the hull.
Deep-V
A hull shape characterized by a sharp deadrise, typically more than 20 degrees.
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.
Fenders
Made of plastic or rubber, the fenders prevent a vessel from moving onto a pier. They prevent damage to the boat as well as the pier should the two come into contact with each other.
Fiberglass
Fiberglass
Fin Keel
A keel shaped like the fin of a fish that is shorter and deeper than a full-length keel.

Flat-Bottom Boat
Type of boat or hull shape with very little or no deadrise.
Fly Bridge
Raised, second-story helm station, often located above the primary helm
Fore
Located at the front of a boat.
Freeboard
Vertical distance between the waterline and the top of the hull side.
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.
Furler
Rolling or folding a sail on its boom.
Galley
The kitchen area on a boat.
Gelcoat
A combination of resin and pigment that comprises the smooth outside coating of a fiberglass boat.