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Chapter 9: Radionavigation

Chapter 9: Radionavigation. Instructor: Fred Williston. All Questions are important for exam. PowerPoint Presentation by Forrest Meiere. S9-1. The absolute accuracy of Loran-C is between ___ and ____ nautical miles. 0.1. 0.25.

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Chapter 9: Radionavigation

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

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

  3. 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. Navigation Study Guide S9-6. The principle of operation of GP5 is based on satellite ________. ranging S9-8. The stated accuracy of the GPS under S/A (95% of the time) is _____________________. 100 meters horizontally

  5. 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 _________. Differential GPS 10 meters 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

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

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

  8. Navigation Study Guide S9-15. The two principal uses for radar aboard ships are __________ and __________________. NavigationCollision Avoidance 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 radar plotting

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

  10. Navigation Study Guide 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. S9-20. A CBDR target is one that exhibits ________ _______ and ________________ presents a risk of collision. constant bearingdecreasing range

  11. Navigation Study Guide 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 ____________________ direction of relative motion closest point of approachtime to the closest point of approach.

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

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