1. Flotilla 12-10 Navigation Study Guide Chapter 9: Radionavigation Instructor: Fred Williston All Questions are important for exam PowerPoint Presentation by Forrest Meiere

2. Flotilla 12-10 Navigation Study Guide an onboard navigation receiver a chain of three to five land-based transmitting stations. S9-2. The components of the Loran-C system include ___________________________ and _______________ S9-1. The absolute accuracy of Loran-C is between ___ and ____ nautical miles. 0.1 0.25

3. Flotilla 12-10 Navigation Study Guide S9-3. Using Loran-C, position is determined as the intersection of _______________________________ two or more lines of position based on the TDs. S9-4. Loran-C LOPs are not printed on most harbor charts because _________________________________________ the corrections for signal propagation are more complex and variable for near shore areas than for outlying areas. Consequently, the possible errors may be larger.

4. Flotilla 12-10 Navigation Study Guide S9-6. The principle of operation of GP5 is based on satellite ________. S9-5. The Global Positioning System (GP5) consists of three segments: _____________, ______________ and ____________. space segment control segment user segment ranging

5. Flotilla 12-10 Navigation Study Guide S9-7. Historically, GPS provided two levels of service: the __________________________ and the ________ _________________. Standard Positioning Service Precise Positioning Service S9-8. The stated accuracy of the GPS under S/A (95% of the time) is _____________________. 100 meters horizontally

6. Flotilla 12-10 Navigation Study Guide S9-9. A system of improved accuracy based upon additional corrections to GP5 is termed _______________. The horizontal accuracy of this system is approximately _________. S9-10. To ensure best accuracy for GPS receivers it is important to set the _______________ to the same as that used on the nautical chart. horizontal datum Differential GPS 10 meters

7. Flotilla 12-10 Navigation Study Guide the closest distance of the aircraft or vessel to its intended track S9-11. A waypoint is an imaginary point that can be ______ in the navigation receiver. stored S9-12. The cross-track error is defined as __________ _____________________________________________.

8. Flotilla 12-10 Navigation Study Guide S9-13. An arrival alarm warns the mariner when __________________________________________ S9-14. The modem radar display screen is known as a ____________________. Plan Position Indicator the vessel or aircraft passes within a user-defined distance of a destination waypoint.

9. Flotilla 12-10 Navigation Study Guide S9-16. Rule 7 of the NA VRULE5 states that " ______ use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and _____________ or equivalent systematic observation of detected objects." Proper S9-15. The two principal uses for radar aboard ships are __________ and __________________. Navigation Collision Avoidance radar plotting

10. Flotilla 12-10 Navigation Study Guide S9-18. To increase the accuracy of range estimates, most radar units are also equipped with one or more ________ _____________. variable range markers S9-17. Two major radar display types are: ______________ and _________. Ship’s head up North up

11. Flotilla 12-10 Navigation Study Guide S9-20. A CBDR target is one that exhibits ________ _______ and ________________ presents a risk of collision. constant bearing decreasing range S9-19. To increase the accuracy with which relative bearings can be read, most modem radar units have one or more ___________________________________ electronic bearing markers or electronic bearing lines.

12. Flotilla 12-10 Navigation Study Guide direction of relative motion closest point of approach time to the closest point of approach. S9-21. CPA stands for the ______________________ and provides a possible indication of collision risk. S9-22. The relative motion plot is used to determine the following quantities: _________________________. _____________________ and ____________________ closest point of approach

13. Flotilla 12-10 Navigation Study Guide Automatic Radar Plotting Aid. S9-23. The vector diagram is used to determine the target's ______ and _____. S9-25. ARPA is an acronym for ________________ End of Questions course speed