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Ship Radar Endorsement
Element 8
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Ship Radar Endorsement · 300 questions

Element 8 - USCG Exam Questions

Ship radar techniques: radar principles, transmitters and receivers, antennas, displays, installation, servicing and safety. The exam asks 50 questions; 38 correct passes.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

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All Element 8 questions

Questions 201–300 of 300 · page 3 of 3

  1. #201 Which of the following inputs is required to indicate azimuth?
  2. #202 Bearing information from the gyro is used to provide the following:
  3. #203 Which of the following statements about “true bearing” is correct?
  4. #204 A true bearing presentation appears as follows:
  5. #205 In a digitized RADAR, the 360 degree sweep is divided into how many digitized segments?
  6. #206 While troubleshooting a memory problem in a raster scan RADAR, you discover that the “REFRESH” cycle is not operating correctly. What type of memory c...
  7. #207 The term DRAM stands for:
  8. #208 How does the dual memory function reduce sea clutter?
  9. #209 How many sequential memory cells with target returns are required to display the target?
  10. #210 What is the primary purpose of display system memory?
  11. #211 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 wou...
  12. #212 What does the term ARPA/CAS refer to?
  13. #213 Which of the following would not be considered an input to the computer of a collision avoidance system?
  14. #214 Which answer best describes a line on the display which indicates a target’s position. The speed is shown by the length of the line and the course by...
  15. #215 What is the purpose or function of the “Trial Mode” used in most ARPA equipment?
  16. #216 The ARPA term CPA refers to:
  17. #217 The display power supply provides the following:
  18. #218 The display power supply provides the following:
  19. #219 In a display system power supply what is the purpose of the chopper?
  20. #220 In a display system power supply, what is the purpose of the inverter?
  21. #221 What would be a common switching frequency for a display system power supply?
  22. #222 What display system power supply output would use a tripler circuit?
  23. #223 The heading flash is a momentary intensification of the sweep line on the PPI presentation. Its function is to:
  24. #224 The major advantage of digitally processing a RADAR signal is:
  25. #225 In order to ensure that a practical filter is able to remove undesired components from the output of an analog-to-digital converter, the sampling freq...
  26. #226 Bearing resolution is:
  27. #227 The output of an RC integrator, when driven by a square wave with a period of much less than one time constant is a:
  28. #228 How do you eliminate stationary objects such as trees, buildings, bridges, etc., from the PPI presentation?
  29. #229 Slotted waveguide arrays, when fed from one end exhibit:
  30. #230 A typical shipboard RADAR antenna is a:
  31. #231 Good bearing resolution largely depends upon:
  32. #232 The center of the transmitted lobe from a slotted waveguide array is:
  33. #233 How does antenna length affect the horizontal beamwidth of the transmitted signal?
  34. #234 What is the most common type of RADAR antenna used aboard commercial maritime vessels?
  35. #235 The VSWR of a microwave transmission line device might be measured using:
  36. #236 The impedance total (ZO) of a transmission line can be calculated by ZO = √L/C when L and C are known. When a section of transmission line contains 25...
  37. #237 If long-length transmission lines are not properly shielded and terminated:
  38. #238 A certain length of transmission line has a characteristic impedance of 72 ohms. If the line is cut at its center, each half of the transmission line...
  39. #239 Standing waves on a transmission line may be an indication that:
  40. #240 What precautions should be taken with horizontal waveguide runs?
  41. #241 The position of the PPI scope sweep must indicate the position of the antenna. The sweep and antenna positions are frequently kept in synchronization...
  42. #242 On a basic synchro system, the angular information is carried on the:
  43. #243 What is the most common type of antenna position indicating device used in modern RADARs?
  44. #244 Which of the following statements about antenna resolvers is correct?
  45. #245 An antenna synchro transmitter is composed of the following:
  46. #246 RADAR antenna direction must be sent to the display in all ARPAs or RADAR systems. How is this accomplished?
  47. #247 Waveguides can be constructed from:
  48. #248 A microwave transmission line constructed of a center conductor suspended between parallel conductive ground planes is called:
  49. #249 Waveguide theory is based upon:
  50. #250 A waveguide is used at RADAR microwave frequencies because:
  51. #251 Waveguide theory is based on the principals of:
  52. #252 How is the signal removed from a waveguide or magnetron?
  53. #253 A rotary joint is used to:
  54. #254 Resistive losses in a waveguide are very small because:
  55. #255 A right-angle bend in an X-band waveguide must have a radius greater than:
  56. #256 To insert RF energy into or extract RF energy from a waveguide, which of the following would not be used?
  57. #257 The following is true concerning waveguides:
  58. #258 At microwave frequencies, waveguides are used instead of conventional coaxial transmission lines because:
  59. #259 When you examine the RADAR you notice that there is no target video in the center of the CRT. The blank spot gets smaller in diameter as you increase...
  60. #260 Range rings on the PPI indicator are oval in shape. Which circuit would you suspect is faulty?
  61. #261 What would be the most likely defective area when there is no target video in the center of the CRT and the blank spot gets smaller in diameter as you...
  62. #262 While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion....
  63. #263 In a RADAR using digital video processing, a bright, wide ring appears at a fixed distance from the center of the display on all digital ranges. The t...
  64. #264 The raster scan RADAR display has missing video in a rectangular block on the screen. Where is the most likely problem area?
  65. #265 A circuit card in a RADAR system has just been replaced with a spare card. You notice the voltage level at point E in Fig. 8F12 is negative 4.75 volts...
  66. #266 A defective crystal in the AFC section will cause:
  67. #267 The RADAR display has sectors of solid video (spoking). What would be the first thing to check?
  68. #268 In the circuit contained in Fig. 8F12, there are 5 volts present at points B and C, and there are zero volts present at points A and D. What is the vo...
  69. #269 If the TR tube malfunctions:
  70. #270 The indicated distance from your own vessel to a lighthouse is found to be in error. What circuit would you suspect?
  71. #271 Silicon crystals are used in RADAR mixer and detector stages. Using an ohmmeter, how might a crystal be checked to determine if it is functional?
  72. #272 In a RADAR unit, if the crystal mixer becomes defective, replace the:
  73. #273 An increase in magnetron current that coincides with a decrease in power output is an indication of what?
  74. #274 It is reported that the RADAR is not receiving small targets. The most likely causes are:
  75. #275 A high magnetron current indicates a/an:
  76. #276 Low or no mixer current could be caused by:
  77. #277 If the magnetron is allowed to operate without the magnetic field in place:
  78. #278 Targets displayed on the RADAR display are not on the same bearing as their visual bearing. What should you first suspect?
  79. #279 Loss of distant targets during and immediately after wet weather indicates:
  80. #280 In a marine RADAR set, a high VSWR is indicated at the magnetron output. The waveguide and rotary joint appear to be functioning properly. What compon...
  81. #281 On a vessel with two RADARs, one has a different range indication on a specific target than the other. How would you determine which RADAR is incorrec...
  82. #282 An increase in the deflection on the magnetron current meter could likely be caused by:
  83. #283 A thick layer of rust and corrosion on the surface of the parabolic dish will have what effect?
  84. #284 The echo box is used for:
  85. #285 What should be done to the interior surface of a waveguide in order to minimize signal loss?
  86. #286 Which of the following is the most useful instrument for RADAR servicing?
  87. #287 A non-magnetic screwdriver should always be used when replacing what component?
  88. #288 What kind of display would indicate water in the waveguide?
  89. #289 Why is coaxial cable often used for S-band installations instead of a waveguide?
  90. #290 RADAR interference to a communications receiver is eliminated by:
  91. #291 Why should long horizontal runs of waveguide be avoided?
  92. #292 Long horizontal sections of waveguides are not desirable because:
  93. #293 In a RADAR system, waveguides should be installed:
  94. #294 What is the most important factor to consider in locating the antenna?
  95. #295 Choose the most correct statement with respect to component damage from electrostatic discharge:
  96. #296 Before testing a RADAR transmitter, it would be a good idea to:
  97. #297 While making repairs or adjustments to RADAR units:
  98. #298 While removing a CRT from its operating casing, it is a good idea to:
  99. #299 If a CRT is dropped:
  100. #300 Prior to removing, servicing or making measurements on any solid state circuit boards from the RADAR set, the operator should ensure that:

Element 8 questions: what to expect

Q How many Element 8 questions are in the Ship Radar Endorsement pool?

There are 300 Element 8 questions on this site, every one released by the U.S. Coast Guard or taken from the National Maritime Center's sample examinations, with its correct answer. The exam draws its Element 8 module from the same pool.

Q What score do I need to pass the Element 8 module?

Most USCG exam modules, including Element 8, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG Element 8 exam questions?

Yes. They are the published U.S. Coast Guard questions, matched to the National Maritime Center's 2026 sample examinations. Answer any question to see the correct choice, the USCG reference and the illustration where the question uses one.

About the Ship Radar Endorsement question pool

The FCC Element 8 pool for the Ship Radar Endorsement: radar theory, installation, servicing and maintenance of ship radar equipment used for navigation.