LESSON ONE KNOW YOUR BOAT

Key Topics Vessel classifications Vessel classifications Hull types and shapes Hull types and shapes Vessel parts Vessel parts Kinds of engines Kinds of engines Personal Watercraft (PWC) Personal Watercraft (PWC) Sailboats 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) Less than 16 feet (Class A) 16 feet to less than 26 feet (Class 1) 16 feet to less than 26 feet (Class 1) 26 feet to less than 40 feet (Class 2) 26 feet to less than 40 feet (Class 2) 40 feet to less than 65 feet (Class 3) 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 ShapesAdvantagesDisadvantages Flat Bottom Hull Planing hull with shallow Rides roughly in draft; good for fishing inchoppy waters. small lakes and rivers. Deep Vee Hull Planing hull gives Takes more power smoother ride in roughto move than a flat water.bottom hull; may roll or bank in sharp turns. There are four basic hull shapes

Hull Types and Shapes (cont.) Hull ShapesAdvantagesDisadvantages 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 area hull; has greater stabilitywhen 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 Complete power unit Higher HP-to-WT ratio than other engine types Higher HP-to-WT ratio than other engine types Separate fuel tanks Separate fuel tanks Internal combustion engines Internal combustion engines Steered by controlling tiller or steering wheel Steered by controlling tiller or steering wheel

Engine Types—Inboards Mounted inside hull’s midsection or in front of transom Mounted inside hull’s midsection or in front of transom Four-stroke automotive engine adapted for marine use Four-stroke automotive engine adapted for marine use Two-stroke engine on PWC Two-stroke engine on PWC Steering is controlled by rudder behind the propeller (except PWC and jet drive boats) Steering is controlled by rudder behind the propeller (except PWC and jet drive boats) PWC steering controlled by jet flow of water PWC steering controlled by jet flow of water

Engine Types—Stern Drives Known as inboard/outboards (I/O) Known as inboard/outboards (I/O) Mounted inside vessel and attached through transom to drive unit Mounted inside vessel and attached through transom to drive unit Four-cycle automotive engines adapted for marine use Four-cycle automotive engines adapted for marine use Steering controlled by drive unit that swivels like outboard 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. 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. 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. 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. 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. 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. 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 Hull Rigging Rigging Keel or centerboard Keel or centerboard Rudder Rudder