Bow: The front of the boat (also known as ‘fore’).
Stern: The back of the boat (also known as ‘aft’).
Hull: The body of the boat, which is sealed to prevent water from getting in. A hull can be open where you sit in it, as in the case of a dinghy, or a deck may cover it, as on a yacht.
Keel: The keel is a long, heavy fin on the bottom of the boat that sticks down into the water. It acts as a counter-weight to the mast, keeping the vessel stable and preventing it from being overturned into water.
Helm: this is where you steer the boat.
Rudder: A hinged blade-like rectangle fixed to the hull below the waterline at the back of the boat that allows for steering.
Tiller: how you steer the boat. A tiller is a pole that connects directly to the rudder and allows you to change the rudder’s angle directly. A (steering) wheel may also be connected to the rudder, but is a little more sophisticated.
Mast: This is the large pole that comes out of the middle of the boat and holds the main sail up.
Boom: This is a pole that is attached at a 90 degree angle to the mast. It holds down the bottom of the mainsail.
Deck: The horizontal surfaces or areas on the outside of a boat—like floors.
Port: Facing forward, this is anything to the left of the boat.
Starboard: Facing forward, this is anything to the right of the boat.