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Flashcards in Planing Hulls Deck (13)
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Personal watercraft

A small vessel that uses an inboard jet drive as its primary source of propulsion, and is designed to be operated by a person or persons sitting, standing, or kneeling on the vessel rather than inside the vessel


Displacement Mode

A planing hull, when operated at very slow speeds, will cut through the water like a displacement hull.


Plowing mode

As speed increases, a planing hull will have a raised bow, reducing the operator's vision and throwing a very large wake. Avoid maintaining a speed that puts your boat in plowing mode.


Planing mode

Your boat is in planing mode when enough power is applied so that the hull glides on top of the water. Different boats reach planing mode at different speeds.


Flat bottom hull

Advantages: this planing hull has a shallow draft, which is good for fishing in small lakes and rivers.
Disadvantages: rides roughly in choppy waters


Deep vee hull

Advantages: this planing hull gives a smoother ride than a flat bottom hull in rough water.
Disadvantages: Takes more power to move at the same speed as flat bottom hulls. May roll or bank in sharp turns


Round bottom hull

Advantages: this typical displacement hull moves easily through the water even at slow speeds
Disadvantages: has a tendency to roll unless it has a deep keel or stabilizers



Advantages: another example of a displacement hull, the multi-hull has greater stability because of its wide beam
Disadvantages: needs a large area when turning



Steering device, usually a vertical blade attached to a post at, or near, the stern of the boat


Class A

Less than 16 feet


Class 1

16 feet to less than 26 feet


Class 2

26 feet to less than 40 feet


Class 3

40 feet to less than 65 feet