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GMDSS · 600 questions

Element 7 - USCG Exam Questions

GMDSS radio operating practices: digital selective calling, INMARSAT, NAVTEX, EPIRBs, search and rescue transponders, and distress, urgency, and safety procedures.

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 7 questions

Questions 501–600 of 600 · page 6 of 6

  1. #961 Which modes could be selected to receive vessel traffic lists from high seas coast radio stations:
  2. #962 MF/HF Transceiver Power levels should be set:
  3. #963 Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  4. #964 Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  5. #965 To set-up the MF/HF Transceiver for a TELEX call to a coast station, the operator must:
  6. #966 To set-up the MF/HF Transceiver for a voice call to a coast station, the operator must:
  7. #967 How are paired SITOR (NBDP) frequencies normally used?
  8. #968 For general communications purposes, simplex frequencies are:
  9. #969 Which of the following defines "ITU Channel 1216"?
  10. #970 Which of the following is a valid 22-MHz ITU Channel?
  11. #971 What is meant by the term duplex "ITU channel"?
  12. #972 ITU duplex channel 1604 would mean:
  13. #973 What is a potential danger of using the manufacturer’s database to set up for operations using MF-HF ITU frequency assignments?
  14. #974 ITU Duplex channels are:
  15. #975 The purpose of ITU channel spacing is:
  16. #976 The proper sequence of channel spacing from narrow to widest is:
  17. #977 For RF communications, "modulation" is best defined as:
  18. #978 For RF communications, "bandwidth" is best defined as:
  19. #979 In an AM broadcast signal using voice:
  20. #980 In FM communications, the information is applied to the carrier by:
  21. #981 The proper sequence of emissions corresponding to the sequence SSB-Voice without carrier, USB-Voice with carrier, FM-Voice and SITOR (NBDP) TELEX is:
  22. #982 How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?
  23. #983 What is the best procedure for calling another ship station using HF radiotelephone when the signals are weak but readable?
  24. #984 What is the correct procedure for calling a coast radio station using HF radiotelephone?
  25. #985 What is the best source of information to find changes or additions to the routine communications frequencies of a Commercial Radio Station?
  26. #986 Which of these is not a primary purpose of the MF/HF DSC controller?
  27. #987 A "Distress Hot Key" MF/HF DSC Distress alert:
  28. #988 Which of these statements regarding a multi-frequency MF/HF DSC Distress alert is FALSE?
  29. #989 To make a call to another vessel requesting voice communications regarding important company business, the GMDSS operator should:
  30. #990 To make a call to another vessel requesting TELEX communications regarding important company business, the GMDSS operator should:
  31. #991 What is meant by describing a Coast Station with the acronym ATOR?
  32. #992 Which of the following acronyms refers to a communications system that does not use ARQ and/or FEC modes?
  33. #993 What does the term FEC mean in SITOR (NBDP) communications?
  34. #994 A Coast Station that is described as ATOR typically provides what type of services?
  35. #995 The acronym SITOR (NBDP) stands for:
  36. #996 What does the term "ARQ" mean in SITOR (NBDP) operations?
  37. #997 Which of the following statements concerning SITOR (NBDP) communications is true?
  38. #998 Which of the following statements concerning SITOR (NBDP) communications is true?
  39. #999 Which statement best defines the SITOR (NBDP) acronym "ARQ"?
  40. #1000 Which statement best defines the SITOR (NBDP) acronym "BFEC"?
  41. #1001 The purpose of "parity" in SITOR (NBDP) communications is?
  42. #1002 "SITOR (NBDP)" communications are based on a digital code system:
  43. #1003 Which of the following would be a valid SELCAL for use in ARQ communications?
  44. #1004 Once ARQ communication with the coast radio station has been established, which of the following events will most likely take place?
  45. #1005 Which of the following methods will give a GMDSS Radio Operator the best indication of whether ARQ communication can be established with a coast radio...
  46. #1006 What is the best method for a GMDSS Radio Operator to determine which SITOR (NBDP) station to contact for the purpose of sending a chargeable message...
  47. #1007 Which statement is correct regarding HF SITOR (NBDP) under GMDSS?
  48. #1008 Which of the following events will take place immediately after phasing with a Coast Station on an available channel?
  49. #1009 During SITOR (NBDP) ARQ operations through a coast station, what should the GMDSS operator do during the "Automatic Exchange of Answerbacks"?
  50. #1010 For ARQ communications with a Public Correspondence Coast Station, which sequence of events best describes reaching the point in time where the text o...
  51. #1011 During ARQ communications, which of these is least likely to cause a coast station to immediately break the phased radio connection:
  52. #1012 During ARQ communications, which of these is least likely to cause a coast station to break the phased radio connection:
  53. #1013 What sequence of ARQ codes matches the following: manual over, end of message text, end of connection to land destination terminal?
  54. #1014 What sequence of ARQ codes matches the following: request establishment of a landline, end radio link after traffic is done, request connection for AM...
  55. #1015 What sequence of ARQ codes matches the following: Send synoptic weather, switch control from a station currently transmitting over to the receiving st...
  56. #1016 A manual ship-ship ARQ message would typically begin with what sequence of ARQ procedures?
  57. #1017 What sequence of ARQ codes matches the following: shore station indicates it is awaiting instructions from the vessel, vessel requests a live connecti...
  58. #1018 All country codes which are transmitted by MF/HF SITOR (NBDP) are preceded by which character(s)?
  59. #1019 Which of the following statements concerning SITOR (NBDP) communications is true?
  60. #1020 What statement is true regarding the exchange between two parties engaged in SITOR (NBDP) communications?
  61. #1021 Of the following, which is true of SITOR (NBDP) ARQ mode?
  62. #1022 Which of the following is true of SITOR (NBDP) ARQ mode?
  63. #1023 Which of the following is true of SITOR (NBDP) ARQ mode:
  64. #1024 The DIRTLX command should be given to a coast station at what point in time?
  65. #1025 Which automatic TELEX command should be sent by a ship station during SITOR (NBDP) operations to properly address a weather report to the national wea...
  66. #1026 Which of the following would be a valid automatic TELEX code and number for a request for a real-time TELEX connection to a shore-based TELEX terminal...
  67. #1027 When requesting a direct TELEX connection to a shore-based TELEX terminal the GMDSS operator must:
  68. #1028 To correctly address a SITOR (NBDP) message and transmit it "live" to a shore-based office the GMDSS operator would dial which sequence:
  69. #1029 Which of the following statements concerning SITOR (NBDP) communications is true?
  70. #1030 Which of the following is true of SITOR (NBDP) in FEC mode, in the presence of static crashes.
  71. #1031 Which of the following statements concerning SITOR (NBDP) communications is true?
  72. #1032 The sequence BFEC, SFEC, ARQ best corresponds to which of the following sequences?
  73. #1033 Selective FEC communications (SFEC) are employed when:
  74. #1034 If the vessel is beyond range of NAVTEX broadcasts and the Inmarsat-C system fails, the GMDSS operator must:
  75. #1035 Why must the GMDSS operator be able to set-up FEC & ARQ modes and differentiate between them?
  76. #1036 BFEC SITOR (NBDP) transmissions might be used to?
  77. #1037 FEC SITOR (NBDP) transmissions are normally used to?
  78. #1038 To ensure effective HF communications, GMDSS operators should:
  79. #1039 A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and...
  80. #1040 A ship at anchor has been communicating with a shore station approximately 350 miles distant on a frequency in the 4 MHz band through early afternoon....
  81. #1041 At mid-day in the summer, what would be the best choice in attempting to communicate, using J3E voice with a shore station some 1800 miles distant?
  82. #1042 At mid-night, what would be the best choice in attempting to communicate, using SITOR (NBDP) with a shore station some 800 miles distant?
  83. #1043 How can a GMDSS operator determine the best frequency band to choose for a SITOR (NBDP) transmission to a shore station?
  84. #1044 The Distress Alarm sounds and the screen readout no longer contains the particulars of the Distress:
  85. #1045 A DSC Distress alert is received by your vessel and your transceiver frequency display reads: Transmit = 4207.5 kHz and Receive = 4207.5 kHz with J3E...
  86. #1046 What are potential dangers of automatic transceiver switching in response to a DSC call?
  87. #1047 Which of these would not be a bad outcome of an Urgency DSC call to all vessels specifying an alternate TELEX frequency & emission that cause your tra...
  88. #1048 An incoming Distress priority 16 MHz DSC call requesting J3E emission might automatically switch to what frequency?
  89. #1049 An incoming DSC Distress alert on 8414.5 kHz will have what result?
  90. #1050 What is the normal voltage of a fully charged single lead acid battery cell?
  91. #1051 What is the normal specific gravity of a fully charged lead acid battery cell? What device is used to measuring the electrolyte of a lead acid battery...
  92. #1052 What is a gel cell battery and how is it maintained & cared for?
  93. #1053 What will cause an individual battery cell to reverse polarity.
  94. #1054 What would be an indication of a malfunction on a GMDSS station with a 24 VDC battery system?
  95. #1055 Which of the following conditions would be a symptom of malfunction in a 2182 kHz radiotelephone system which must be reported to the Master?
  96. #1056 Which would indicate a malfunction in a 2182 kHz radiotelephone system?
  97. #1057 Which would indicate proper operation of a SSB transmitter rated at 60 Watt PEP output in J3E mode?
  98. #1058 Which would be an indication of proper operation of a SSB transmitter rated at 60 watt PEP output?
  99. #1059 Your antenna coupler/tuner becomes totally inoperative. What would you do to obtain operation on 2 HF bands?
  100. #1060 Your MF-HF whip antenna breaks off and is carried away in a storm. What would you do to regain operation on MF-HF frequencies?

Element 7 questions: what to expect

Q How many Element 7 questions are in the GMDSS pool?

There are 600 Element 7 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 7 module from the same pool.

Q What score do I need to pass the Element 7 module?

Most USCG exam modules, including Element 7, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG Element 7 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 GMDSS question pool

These are the published GMDSS Element 7 questions covering radio operating practices: DSC, satellite communications, NAVTEX, EPIRBs, and distress procedures. The GMDSS Radio Operator exam draws from this pool.