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Page Title: Assignment 7
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ASSIGNMENT 7 Textbook Assignment: "Introduction to Celestial Navigation (continued)," and "Tides and Currents", chapters 6 and 7, pages 6-10 through 7-23. 7-1. 7-7. 7-2. 7-3. 7-4. 7-5. 7-6. When using H.O. Pub. 249 for figuring stars, which of the following  information  must  you know? 1.   GHA of Aries 2.    LHA of Aries 3.    Declination 4.    Longitude When star time is figured, what is the formula for (a) evening and (b) morning  star  times? 1. (a) Subtract 30 minutes (b) subtract 45 minutes 2. (a) Add 45 minutes (b) add 30 minutes 3. (a) Add 45 minutes (b) subtract 45 minutes 4. (a) Add 30 minutes (b) subtract 45 minutes Time of sunset is 2018 GMT. What is star time for a vessel located at  17°23'N  latitude  and  74°38'E longitude? 1. 1933 2. 1948 3. 2018 4. 2048 How should longitude be applied to GHA to find LHA? 1. 2. 3. 4. Add  west  longitude  and  subtract west  longitude Always  add  west  longitude Always  subtract  east  longitude Add  east  longitude  and  subtract west  longitude Before entering the H.O. Pub. 249, which information must you know? 1. LHA only 2.    Declination  and  LHA 3. Latitude  and  LHA 4. Latitude and GHA What information about a star may be found in H.O. Pub 249? 7-13. 1.    Hc and Ha 2.    Ha and Zn 3.    Ho and Hc 4.    Hc and Zn 7-8. 7-9. 7-10. 7-11. 7-12. A total of how many templates make up  the  Rude  Starfinder? 1. 10 2. 12 3. 14 4. 15 If a vessel is at 58° latitude, which  Rude  Starfinder  template should be used? 1.   45°S 2.    50°S 3.    55°S 4.    60°S On  the  Rude  Starfinder  template, what is the minimum and maximum degree  intervals  from  the  horizon? 1. 5° to 80° 2. 5° to 90° 3. 0° to 90° 4. 0° to 80° Which of the following is not a function of the Rude Starfinder? 1.    To identify unknown stars 2.    To allow the observer to choose many  stars 3.    To  identify  planets 4. To plot the Sun and Moon To use the Rude Starfinder, which information is needed? 1.    LHA 2.    GHA 3.    Latitude 4.    Declination Which of the following terms applies to the vertical movement of water? 1.    Currents 2.    Tides 3. Set 4.    Drift Which of the following gravitational  forces  causes  tides? 1.    Earth and Moon only 2.    Moon and Sun only 3.    Earth and Sun only 4.    Earth,  Moon,  and  Sun 38

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