1. Your vessel is underway making a speed of around 10 knots. At 1800 hours, you observed a target on your radar dead ahead at a range of 10 nautical miles. At 1812 hours the target is still dead ahead at a range of 8 miles. What is the status of the target?

2. How will you avoid the posiibility of errors in bearing when using mechanical bearing cursor in the opration of the RADAR?

3. How long will it takes for the Radar to be fully operational (RUN STATUS) after switching ON from cold?

4. What ideas justify cause the SART to begin a transmission?

5. What ca you expect from the ARPA target tracking system in auto acquisition mode?

6. What is one good practice of a navigator fixing a vessel position by means of Radar?

7. The following are navigational systems that work with ARPA EXCEPT:

8. How should the signal from a Search and Rescue RADAR transponder appear on a RADAR display?

9. Which of the following will cause the ARPA to emit either or both a visual and audible alarm?

10. In calm and clutter free conditions, what is the minimum detection range for X-band radar if the target is a 10-meter tall SOLAS ship (more than 5,000 gross tonnage)?

11. An S-Band radar operates in which frequency band?

12. When you are approaching a RACON fitted with a LIGHT, how would the RACON be identified on the radar?

13. What is the approximate wave length of an X-band radar operating on a frequency of approximately 9500MGHz?

14. What is the purpose of radar tracking of other ships?

15. What do you call the target echoes that appear along a line?

16. Which of the following situation will cause the ARPA to emit a visual alarm, audible alarm, or both?

17. What is a situation wherein a radar contact will remain stationary if your radar is on a relative motion display only?

18. You have set your ARPA limits defining dangerous targets as CPA range of 3 n.m. and time of CPA of 10 minutes. Which of the following would cause a dangerous target alarm to activate?

19. Which of the following is included in the International Regulations for Prevention of Collision at Sea?

20. What caused the side echoes on the radar?

21. In what time frame must an ARPA produce a true motion with 95% accuracy and true course and speed?

22. With regard to ARPA, what does the "lost target" warning denotes?

23. In the charts, objects are sometimes marked "Racon". What is a Racon?

24. What is the most accurate measurement a Radar can provide?

25. What is the IMO requirement for ARPA detection?

26. What is the term for the number of pulses sent out by the scanner in one second?

27. What is the range discrimination of a radar set of pulse length 60 meters?

28. What ratio would a typical ARPA use before writing a target into the final switch register?

29. How does height above sea level influence the radar range of detection of a target?

30. What is the minimum display area diameter in the performance requirements for all ships/crafts less than 500 gross tonnage?

31. You are underway at 5 knots and you observe from your radar a target with a range of 10 miles directly astern of you, twelve minutes later, the target is 8 miles directly astern of you. What is the estimated speed of the contact?

32. Indicate three important target data which can be received from radar tracking of other vessel.

33. Which of the following statements concerning operational requirements for the radar system is TRUE?

34. What are the two most important pieces of input information required to operate the ARPA accurately?

35. From which of the following does an ARPA builds up the track history of a target?

36. What is one cause of a radar bearing error?

37. According to Rule 19 of the COLREGs, what must be your action if you detect another vessel by radar alone?

38. In what time frame an ARPA should present a steady state tracking the motion of a target with the following accuracy values ( 95% probability values)?

39. What is the pulse length of a typical radar?

40. The following are navigational system that work with the ARPA EXCEPT:

41. Which part of the ship must the radar transceiver be kept from at a safe distance?

42. Which of the following has the most effect on the size and shape of radar small targets?

43. By radar alone, you detect a vessel ahead on a collision course, about 3 miles distant. Your radar plot shows this to be a meeting situation. Which action should you take?

44. From where are the radar target ranges obtained?

45. What is the radar control to be adjusted so that echoes from rain can be reduced?

46. How does a RADAR distinguish separate targets on the same bearing but having small difference in range?

47. In radar principles, when would second trace echoes are more likely to occur?

48. Which radar control that shortens all echoes on the dispaly and reduces clutter caused by rain or snow?

49. Which of the following situation will cause the ARPA to emit a visual alarm, audible alarm, or both?

50. What is dangerous with opeating the ARPA in mixed mode over time?

51. When using the ARPA in heavy rain, which action should you take ?

52. Which of these factors would cause blind sectors on the PPI?

53. How can a rescue personnel detect that a SART is transmitting in the immediate vicinity?

54. What is the radar control that shortens all echoes on the display and reduces clutter caused by rain and snow?

55. Which of the following radar presentation feature can be used to advantage for position fixing?

56. Under COLREGs Rule 7, what is included in the proper use of radar to determine risk of collision?

57. How often does ARPA extracts range and bearing information?

58. What is called as the rate at which two moving objects approach or separate from each other?

59. What is the function of the heading flash when the sweep line is momentarily intensified on the PPI presentation?

60. If your vessel while proceeding North at 15 knots, observed by radar a stationary target, what would be the approximate direction and rate at which the pip would move on your PPI scope?

61. You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?

62. What should be the range accuracy of a typical radar?

63. An indirect radar echo is caused by a reflection of the main lobe of the radar beams off the observers vessel. Which of the following is NOT a characteristics of indirect echoes?

64. When radar display is set so that your vessel appears at the center of the screen and the heading is set to always point to zero degrees , The observed bearings can be defined by which of the following?

65. Which radar control is used to adjust the intensity of the illumination of the radar between radar images and background of the screen?

66. The ship's speed indication on the ARPA display can be set manually but does not change with changes in the vessel's speed. What other indication would point to a related equipment failure?>

67. How is a true motion shown in a radar display?

68. What is the minimum size of the vessel that requires 9 GHz radar system to be fitted?

69. Which statement is TRUE concerning risk of collision?

70. What should you do to ensure that the RACON signal is displayed on the radar?

71. Short range resolution or pulse length will have what kind of an effect on the appearance of targets on the radar scope?

72. Which of the following has the most effect on the size and shape of small radar targets?

73. Your vessel is making 10 knots . After several observation of a target, it remain in the same position relative to yours, what could be the possible analysis of the situation?

74. You are using a radar which your own ship is shown at the center, and the heading flash always points to 0degree. If bearings are measured in relation to the flash, what type of bearings are produced?

75. You are underway making 10 knots through the water, and after several observation a target remain in the same position relative to yours, what could be the possible conclusion of the scenario?

76. What circuit controls the suppression of sea clutter

77. If your vessel, while proceeding South at 10 knots, observed by a radar a vessel proceeding South at 10 knots, what would be the approximate direction and rate at which the pip would move on your PPI scope?

78. Which mode of the ARPA that when it is used properly, it will produce greater accuracy?

79. If there is another ship overtaking you close to starboard, and you have three radar targets bearing 90 degrees relative at ranges 0.5miles, 1.0miles and 1.5 miles. In this case what are the unwanted echoes?

80. What must be the size of the radar beam to provide accurate target bearings?

81. In what time frame must an ARPA produce a relative motion with 95% accuracy and CPA/TCPA?

82. Trial maneuver in ARPA fitted on vessels of over what tonnage

83. What must be the minimum activated AIS target capacity of an ARPA?

84. What is the factor in determining a radar maximum range?

85. When navigating in thick fog with the radar on, which action should you take?

86. What do you call a radar display which is oriented so that north is always at the top of the screen?

87. Which statement is TRUE concerning a vessel equipped with operational radar?

88. What would mean the description "Racon" beside an illustration on a chart?

89. What do you call the marker in the radar PPI which the operator can put in any direction to watch the incoming target?

90. What is the radar control used to reduce sea clutter?

91. It is a device for transmitting coded signal in response to a signal interrogated by radio direction and ranging equipment from the vessel.

92. Which of the following has the most effect on the definition of small target on the radar display?

93. When on automatic tracking operation, how would the two targets presented by ARPA may swap information?

94. What should you do in order to ensure that a RACON signals displayed on the radar

95. According to the requirement of the Rules, which factor to be taken into account when determining safe speed?

96. What happened when radar waves are trapped in the atmospheric duct?

97. What should be done in order to ensure that the RACON signal is visible on your 3 cm radar?

98. What is the purpose of the function "Anti-sea clutter" in the radar?

99. How can risk of collision can best be assessed if your vessel is underway in restricted visibility?

100. What is the radar presentation feature which is useful in radar pilotage?