Nautical Questions PDF

1. What is the position obtained by applying only your vessel's course and speed to a known position? a. Dead reckoning 2. What is the position obtained by applying estimated current and wind to your vessel\'s course and speed? b. Estimated position 3. A barometric pressure...

1. What is the position obtained by applying only your vessel's course and speed to a known position? a. Dead reckoning 2. What is the position obtained by applying estimated current and wind to your vessel\'s course and speed? b. Estimated position 3. A barometric pressure reading of 19.91 inches of mercury is equivalent to c. 1013.25 millibars 4. Apparent altitude is sextant altitude corrected for \_\_\_\_\_\_\_\_\_\_. d. Inaccuracies in the reading and reference level 5. Where can the data relating to the direction and velocity of rotary tidal currents be found? e. Tidal Current Tables 6. What is the speed of sound in the water? f. 1.5 kilometres per second 7. What is the frequency of the low frequency pulse of the echo sounder? g. 24 kHz 8. On an echo sounder, which of these is used to draw a line on the paper to mark a specific time of an occurrence? h. Event maker 9. When the water salinity increases, what happens to the speed of sound? i. It increases 10. What is the nature of the beam transmitted by echo sounder? j. Directional 11. Which of these is an echo sounder transducer type? k. Magnetostriction 12. Which of these may cause false echoes in an echo sounder? l. Turbulence from the interaction of tidal streams wi 13. What is a phenomenon in which the axis of an object wobbles when torque is applied? m. torque induced precession 14. What is an error in a gyrocompass caused by rapid changes in course, speed and latitude causing deviation before the gyro can adjust itself? n. Stream error 15. Which statement about the Flinders bar on a magnetic compass is correct? o. It compensates for the error caused by the vertical 16. Your vessel's heading is 330 degreespsc and 345 degreespsc with a 2 degrees E gyro error. If there is a variation of 10 degrees W, what is the deviation on this heading? p. 3° W 17. Your vessel's heading is 330 degreespsc and 345 degreespsc with a 2 degrees E gyro error. If there is a variation of 6 degrees W, what is the deviation on this heading? q. 7° W 18. Your vessel's heading is 330 degreespsc and 345 degreespsc with a 2 degrees E gyro error. If there is a variation of 13 degrees W, what is the deviation on this heading? r. 0° S 19. The shortest distance between any two points on earth defies a \_\_\_\_\_\_\_\_\_. s. Great circle 20. What is a chart that covers a large area? t. Small scale chart 21. Isogonic lines are lines on a chart indicating: u. Points of equal variation 22. The revision of a chart is printed on what area of the chart? v. Lower left center 23. The visibility of lights indicated in the charts is in nautical miles for: w. Charted range of the light 24. A Mercator chart is a: x. Cylindrical projection 25. Which chart symbol indicates that the bottom is coral? y. Co 26. What publication contains ocean current information for voyage planning from Tokyo to san Francisco? z. Sailing directions 27. What do you call the altitude after applying the dip and index error? a. Apparent altitude 28. A phase correction is applied to observations of: b. Planets 29. When using GPS, you may expect your position to be accurate 95percent of the time within a radius of \_\_\_\_\_\_\_ meters. c. 100 m 30. When navigating using DGPS, you may expect your position to be accurate to within a radius of \_\_\_\_\_\_meters. d. 10 m 31. The angle between the grid and magnetic meridians is called grid variations or \_\_\_\_\_\_\_\_\_. e. Grivation 32. The reaction of a gyro compass to an applied force is known as: f. Precession 33. What navigational instrument used to indicate direction by measuring course and bearing? g. Compass 34. The compass rose on a nautical chart indicates both variation and \_\_\_\_\_\_\_\_ h. Annual rate of variation change 35. The standard atmospheric pressure in millimetres of mercury is: i. 760 36. Your ship is steaming at night with the gyro-pilot engaged when you notice that the vessel\'s course is slowly changing to the right. What action should you take FIRST? j. Switch to hand steering 37. How many degrees north or south of the Tropic of Cancer is the Arctic Circle? k. 44 degree 06' North 38. Automatic device for steering a vessel by means of control signals received from a gyro compass is called \_\_\_\_\_\_\_. l. Gyropilot 39. What is the length of a nautical mile? m. 6,076 feet 40. The interval between the sun's upper limb being in the horizon and its center being 12 degrees below is called: n. Nautical twilight 41. The dividing meridian between zone description +4 and +5 is \_\_\_\_\_. o. 67° 30° W 42. Physical checks of gyro, azimuth circle and pelorus include the following, EXCEPT: p. align peloruses with fore-and-aft line of the ship 43. The bending of a wave as it passes an obstruction is called \_\_\_\_\_\_\_\_\_. q. Diffraction 44. While voyage planning and navigating, a mariner must refer to both texts and tables. Tables includes the following EXCEPT: r. Sailing directions 45. In the IALA 8uoyage System, what is the color of an East Cardinal Mark? s. Black band above and below yellow band 46. Who is responsible for the voyage plan? t. Navigation officer 47. When relieving the helm, the new helmsman should know the \_\_\_\_\_\_\_. u. Course per magnetic steering compass 48. A crew member has just fallen overboard off your port side. Which action should you take? v. Immediately put the rudder over hardleft 49. A report of casualty to a vessel must include \_\_\_\_\_\_\_\_\_. w. The name of the owner or agent of the vessel 50. Which situation requires you to furnish a notice of marine casualty to the coast guard? x. Your vessel is at anchor and grounds at low tide wit