Advance: The distance a pontoon boat travels after its steering has been turned to a different course.
Aft: The rear section of your pontoon boat.
Amidships: The middle of your pontoon boat.
Bilge: The lowest area of a boat where excess water gathers.
Bow: The forward half of your pontoon boat.
Burdened: A burdened vessel is a vessel that must yield to another craft.
BWI: Acronym for Boating While Intoxicated. BWIs are the number one cause of boating fatalities in the United States.
Catamaran: A boat with two hulls. Many pontoon boats are catamarans.
Cross Beams: Parallel slats that connect two or more pontoons and form the basis of a foundation for the pontoon boat's deck.
Deck: The floor of your pontoon boat.
Deck Boat: A monohull boat constructed with fiberglass.
Gel Coat: A colored layer of resin that covers the fiberglass of pontoon boats.
Head-On: An event where two vessels approach each other head-on. Neither vessel has the right of way and both should usually pass each other on their port sides.
Helm: The directional control station on your pontoon boat akin to an automobile's steering wheel.
Hull: The outside of a pontoon boat that makes contact with the water.
Inboard: An arrangement where the engine of the board is in the interior of your pontoon boat.
In Extremis: A condition where neither captain of a vessel can avoid a collision and both should attempt to maneuver and take a “glancing blow” to reduce damage.
I/O: An abbreviation for “inboard/outboard” configuration where the engine is in the interior, while the drive unit is on the exterior. Also known as a “stern drive”
Inverse Buoyancy: A unique condition for pontoon boats where adding more weight to the pontoon boat decreases stability and increases the possibility for capsizing.
In Sight: A condition where the captains of two or more vessels can see the other's boat.
Logs: Cylindrical pontoons that provide buoyancy for pontoon boats.
Navigation Lights: All pontoon boats must display lights during nighttime travel to show size, type, and direction of the pontoon boat.
Making Way: A vessel that is both underway and propelled by an engine or sails.
Mayday: A term used over marine radio frequencies to denote a boat with an extreme emergency, such as a fire or sinking.
NMMA: Stands for the National Marine Manufacturers Association, which is the only organization that certifies the manufacturing and quality of pontoon boats.
Not Making Way: A vessel that is adrift, not anchored, and moving due to currents or the wind.
Outboard: A configuration where both the engine and drive are on the exterior of the boat.
Overtaking: An event where one faster boat approaches from a slower boat's rear. In this situation, the slower craft has the right-of-way.
PFD: Stands for Personal Flotation Device. Law requires that every pontoon boat have at least one PFD per passenger.
Pontoon Boat: A multihull vessel that uses hollow cylinders for buoyancy.
Port: The left-hand side of your pontoon boat.
Pressure-Treated: The infusion of chemicals into wood to stop rotting. Many pontoon boat decks are constructed with pressure-treated wood.
Prop: The pontoon boat's propeller that provides forward motion.
Restricted Visibility: Rain, snow, or other weather condition that reduces visibility.
Right-of-Way: When encountering another craft, your pontoon boat with right-of-way can continue with its course and speed.
Rafting: A group of boats banded together.
Safe Speed: The maximum speed that a pontoon boat can undertake to ensure no collisions with other vessels.
Stability: A pontoon boat's potential to handle weight shifts from side to side.
Starboard: The right-hand side of your pontoon boat.
Stern: The rearmost area of your pontoon boat.
Throttle: A hand lever or levers that controls speed and forward or reverse motion.
Tracking: The degree to which your pontoon boat can hold a straight course.
Trimaran: A boat, such as a pontoon boat with three hulls. A few pontoon boats have trimaran designs.
Underway: A boat in motion, either by deliberate direction or by drifting on a current.
Vessel: Every sort of vehicle, including pontoon boats, whose main mode of transportation involves water.
Visual Distress Signals: Non-electronic signals, such as flags or flares, to draw attention to a vessel.
Wake: The waves that are a result of forward motion of your pontoon boat.
Whistle Signals: Audible signals, made by air or electric horn blasts, to communicate between vessels. All power-driven vessels, such as pontoon boats, are required to use these signals.
Water Stage: The water level and depth of rivers. This varies based on location and season. Also known as a river's “gage.”