LESSON ONE KNOW YOUR BOAT
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Transcript of LESSON ONE KNOW YOUR BOAT
LESSON ONEKNOW YOUR BOAT
Key Topics
Vessel classifications
Hull types and shapes
Vessel parts
Kinds of engines
Personal Watercraft (PWC)
Sailboats
Objectives
You should …
► be able to identify the different types of hulls and their performance characteristics.
► be able to identify the basic parts of a boat, a PWC, and a sailboat.
► be able to identify the different kinds of engines commonly found in recreational vessels and their uses.
Length Classes
Vessels divided into classes by length which dictates equipment necessary to comply with federal and state laws.
Length Classes (cont.)
Four most common length classes are:
Less than 16 feet (Class A)
16 feet to less than 26 feet (Class 1)
26 feet to less than 40 feet (Class 2)
40 feet to less than 65 feet (Class 3)
Hull Types and Shapes
Displacement hulls are designed to cut through water.
Planing hulls rise up and glide on top of the water.
Hull Types and Shapes (cont.)
Hull Shapes Advantages Disadvantages
Flat Bottom Hull Planing hull with shallow Rides roughly in
draft; good for fishing in choppy waters.small lakes and rivers.
Deep Vee Hull Planing hull gives Takes more powersmoother ride in rough to move than a flatwater. bottom hull; may
roll or bank in sharp turns.
There are four basic hull shapes
Hull Types and Shapes (cont.)
Hull Shapes Advantages Disadvantages
Round Bottom Hull Typical displacement hull Has a tendency to roll
that moves easily through unless it has a deep water even at slow speeds. keel or stabilizers.
Multi-Hull Another displacement Needs large areahull; has greater stability when turning.because of wide beam.
Vessel Terminology
Vessel Terminology (cont.)
Transom: Vertical surface at the back of the hull
Engine Types—Outboards
Complete power unit
Higher HP-to-WT ratio than other engine types
Separate fuel tanks
Internal combustion engines
Steered by controlling tiller or steering wheel
Engine Types—Inboards
Mounted inside hull’s midsection or in front of transom
Four-stroke automotive engine adapted for marine use
Two-stroke engine on PWC
Steering is controlled by rudder behind the propeller (except PWC and jet drive boats)
PWC steering controlled by jet flow of water
Engine Types—Stern Drives
Known as inboard/outboards (I/O)
Mounted inside vessel and attached through transom to drive unit
Four-cycle automotive engines adapted for marine use
Steering controlled by drive unit that swivels like outboard
Engine Types—Jet Drives
Jet drives propel vessel by jet of water forced out back of vessel. Directing jet steers vessel.
PWC are most common type of vessels using jet drive.
Engine Types—Jet Drives (cont.)
May power larger vessels—commonly used for vessels designed for shallow water conditions. Jet boats can have inboard or outboard jet drives.
Personal Watercraft (PWC)
PWCs are small vessels which use an inboard jet drive as primary source of propulsion.
U.S. Coast Guard includes PWC in group of inboard vessels, less than 16 feet in length.
PWCs are subject to same laws and requirements of any other vessel plus some specific to PWCs.
Personal Watercraft (cont.)
Sailboats
Sailboats basically consist of four components:
Hull
Rigging
Keel or centerboard
Rudder