1. Flotilla 12-10 Navigation Study Guide Chapter 11: Fuel and Voyage Planning Instructor: Bob Garrison All Questions from the Study Guide. PowerPoint Presentation by Forrest Meiere

2. Flotilla 12-10 Navigation Study Guide S11-1. What is a fuel consumption chart or curve? _____ S11-2. Define the term fuel efficiency. ______________ A chart or curve integrating two types of information. 1st, it includes the relationship between engine throttle setting in RPM and the vessel's speed through the water, 2nd, it includes the relationship between engine RPM and the fuel consumption rate, measured in gallons per hour. The distance the vessel can travel on each gallon of fuel, measured in MPG.

3. Flotilla 12-10 Navigation Study Guide S11-3. Define the term range. _________________ S11-4. Define the term endurance. _______________ Endurance is the length of time in hours that the vessel can be operated at a given setting until the en route fuel is exhausted. Range is the distance in nautical miles that a vessel can travel with the fuel available.

4. Flotilla 12-10 Navigation Study Guide S11-6. How does speed affect fuel efficiency and range for displacement or semi-displacement vessels? S11-5. Define the term fuel reserve. ______________ Fuel Reserve is a reserve or set-aside to allow for contingencies or unforeseen circumstances that could arise in a voyage. For displacement or semi-displacement vessel, increased speed generally decreases efficiency and range.

5. Flotilla 12-10 Navigation Study Guide S11- 7. How does speed affect fuel efficiency and range for planing hull vessels? _________________________ The relationship is complex. Efficiency may decrease at displacement speeds, and then increase as the vessel gets on plane. Ultimately, fuel efficiency decreases at high speeds. S11-8. What are the factors that affect fuel efficiency? These include vessel hull design, condition of hull, engine type, horsepower, and condition, engine throttle setting, weight and weight distribution, trim settings, fair or foul currents, wind and sea conditions, and the ability of the helmsman to maintain course.

6. Flotilla 12-10 Navigation Study Guide S11-9. How do fair or foul currents affect fuel efficiency? S11-10.What is a "Howgozit" chart? A "Howgozit" chart shows the vessel's fuel state and distance remaining. It is used for underway fuel management. Fair currents increase fuel efficiency, foul currents decrease fuel efficiency. End of Questions