Brig. Vessel with two masts, both square-rigged but having a gaff mainsail.
Buoy. A floating object moored over a certain spot; generally a warning of danger.
Buoyancy. The capacity for floating which a boat possesses.
Cabin. Room for use of officers and passengers.
Capstan. Consists of a long drum revolving vertically and used for pulling in heavy lines. Sometimes used in connection with windlass to hoist anchor by hand.
Center of Gravity. Center of weight.
Coaming. Raised planking around hatchway of yacht to prevent water shipped in rough weather from getting below decks.
Cockpit. Formerly an apartment under lower gun-deck of warship, used as quarters for junior officers, and during a battle devoted to the surgeon and his assistants.
Cockswain. Person who steers a boat.
Compass. Instrument composed of one or more magnetic needles attached to a circular card which turns freely on the point of a steel cone or floats on a liquid. The upper surface of the card is divided into the 32 points of the compass. Used to find direction.