-floats boat by displacing a volume of water equal in weight to hull and its load
-pushes away (displaces) water allowing the hull to settle down into the water
-hull pushes out this water creating waves
-water separates at the bow and closes at the stern
-length of waves depends upon the boats length and speed
at rest= same as displacement hull, but when on plane, boat skims along water line/on top of water
-combination of planning and displacement hull
-up to a certain power/speed hull remains in displacement mode, beyond this point hull is raised to PARTIAL plane but never full plane b/c hull is always remaining in the water
-flat plate keel
-has stiffeners (vertical or upright members that increase strength) that protect the boat's hull plating if the boat grounds on a hard bottom
-increases boat's draft b/c it extends below the bottom of boat
-has a plate that is perpendicular to the centerline of the hull
-vertical center keel runs internal to the hull at centerline that supports the flat plate keel
-when combined forms an "I" shape
3.5' at the bow
1' at recovery
displacement is the weight of a boat and is measured in long tons (2,240 lbs) or pounds.
A gross ton is the entire cubic capacity of a boat expressed in tons of 100 cubic feet.
A net ton is the carrying capacity of a boat expressed in tons of 100 cubic feet. It is calculated by measuring the cubic content of the cargo and passenger spaces.
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