Service Classification Definition

Pleasure Craft 

Maximum power capacity is intended only for personal use, planing hull pleasure craft where full engine throttle operation will be less than 5% of total time with balance of time at 87% of full throttle engine RPM or less. Marine Gears used in long range pleasure cruisers, sportfish charters or any commercial service should not be selected according to Pleasure Craft Service Classification. 

Intermediate Duty 

pleasure or Commercial usage of planing or semi-displacement hull craft can qualify for Intermediate Duty Service Classification if full throttle operation will average only a few hours per day with major portion of usage at partial throttle and total annual usage will be 2000 hours or less. 

Examples:  

1. Long Range Pleasure Cruisers 
2. Portfish Charter Boats 
3. Party Fishing Boats 
4. Some Crew Boats,  
5. Lobster Boats  
6. Harbor and Coastal Patrol Boat 
7. Search and Rescue Boats 
8. Fire Boats 

Continuous Duty 

Commonly called "Workboat Duty," these Marine Gear applications are expected to operate continuously at fuII engine governed speed. The propulsion engine power setting must be known and must be within the Marine Gear's allowable input rating for continuous daylong or around-the-clock service. 

Most displacement hull vessels are powered for Continuous Duty service. However, the actual engine (and Marine Gear) power loading depends on: 

1. The propeller used 
2. The vessel's work assignment 
3. The captain's choice of throttle setting during continuous service