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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 401–500 of 600 · page 5 of 6

  1. #861 Which satellite should be chosen when the vessel is operating between Japan and the Bering Sea?
  2. #862 Which longitude corresponds to the AOR-W satellite for Inmarsat-C communications?
  3. #863 Which longitude corresponds to the AOR-E satellite for Inmarsat-C communications?
  4. #864 Which longitude corresponds to the POR's satellite location for Inmarsat-C communications?
  5. #865 Which longitude corresponds to the IOR's satellite location for Inmarsat-C communications?
  6. #866 Which action must be taken to ensure that incoming message traffic of all priority levels will be received through Inmarsat-C?
  7. #867 When logging into the Inmarsat system using Inmarsat-C, it is necessary to:
  8. #868 What action should be taken on changing from one Inmarsat-C ocean region to another?
  9. #869 What is the primary danger of an Inmarsat-C terminal if it is not properly logged out?
  10. #870 Which of these can take place on an Inmarsat-C terminal that has synch with the NCS CC but has not yet performed a successful login?
  11. #871 Which of the following is NOT an example of a failure to log-out properly?
  12. #872 What is the primary function of a LES?
  13. #873 Messages are transmitted by an Inmarsat LES according to what criteria?
  14. #874 How is maximum communications coverage provided by satellites in the Inmarsat maritime satellite service?
  15. #875 What factors bear on the choice of NCS on an Inmarsat terminal?
  16. #876 What is the purpose of a CODEC?
  17. #877 Iridium satellites are in what sort of orbits?
  18. #878 How are Iridium antennas tracking the satellites?
  19. #879 The Iridium terminal typically displays what status indicators?
  20. #880 How are Iridium calls routed through the satellite system?
  21. #881 Which of the following statements concerning Iridium satellites is true?
  22. #882 What is the primary purpose of an Iridium LES?
  23. #883 How is a signal radiated from an Inmarsat-FBB system's antenna?
  24. #884 Inmarsat FBB coverage is provided by?
  25. #885 How does an FBB terminal notify shore authorities of a Distress situation with priority pre-emption?
  26. #886 What features in a Maritime Safety Terminal (MST) are required for FBB units to meet GMDSS requirements?
  27. #887 How does an FBB terminal fully meet compulsory GMDSS requirements?
  28. #888 When engaging in voice communications via an Inmarsat-FBB terminal, what procedures are used?
  29. #889 What is the average length of time required for a TELEX sent by Inmarsat-C to be delivered to the addressee?
  30. #890 With an Inmarsat-C LES, how are messages routed to receiving stations?
  31. #891 How are Inmarsat-C LESs selected by the operator?
  32. #892 Which statement about Inmarsat-C LESs is true?
  33. #893 It is possible to transmit all of the following via Inmarsat-C from a vessel EXCEPT?
  34. #894 Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  35. #895 When Inmarsat-FBB and Inmarsat-C terminals are compared:
  36. #896 Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  37. #897 When Inmarsat-FBB and Inmarsat-C terminals are compared:
  38. #898 Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  39. #899 When Inmarsat-FBB and Inmarsat-C terminals are compared:
  40. #900 Which Inmarsat Earth stations would be available for Inmarsat-C traffic if the vessel is off the Pacific Coast of the United States but logged-in to t...
  41. #901 Which Inmarsat Earth stations would be available for Inmarsat-C traffic if the vessel is off the Atlantic Coast of the United States and tracking the...
  42. #902 Which LES should a GMDSS Radio Operator select to update an Inmarsat-C Distress alert message if the vessel is in the southern Pacific Ocean near the...
  43. #903 Which Inmarsat Earth stations could a GMDSS Radio Operator select to update an Inmarsat- C Distress alert message if the vessel is in the Mediterranea...
  44. #904 Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-C traffic if operating off the Atlantic Coast of the United States and tracking the...
  45. #905 Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-C traffic if operating on a voyage from Diego Garcia to the Persian Gulf and synched...
  46. #906 A vessel is tracking the AOR-W satellite. To initiate an F77 automatic ship-to-shore telephone contact to a shoreside party in the U.S. phone # 123-45...
  47. #907 A vessel is tracking the AOR-E satellite. To initiate an operator assisted F77 ship-to-shore telephone contact to a shoreside party in the U.S.A., # 2...
  48. #908 To request medical assistance from Inmarsat via voice what would be the correct procedure?
  49. #909 Which of the following would be a valid sequence to request an F77 automatically dialed ship-ship voice call to an F77 terminal on a vessel tracking t...
  50. #910 If you are tracking the AOR-W satellite and wish to communicate by F77 voice using LES Southbury with another ship tracking the AOR-E satellite what i...
  51. #911 Which of the following is a correct dialing sequence for a F77 vessel tracking the AOR-W satellite to make a voice call to an Iridium terminal via Yam...
  52. #912 How is a voice call to a shoreside destination typically dialed from an Iridium terminal handset?
  53. #913 What is an advantage of an Iridium terminal for making voice calls?
  54. #914 How would a shoreside party dial an Iridium terminal on a ship?
  55. #915 What entry would you make on an Iridium terminal to make a telephone call to an Inmarsat terminal on another ship that is 300 miles west of San Franci...
  56. #916 What entry would you make on an Iridium terminal to make a telephone call to another Iridium terminal?
  57. #917 What is an advantage of the Iridium system for placing ship-ship calls?
  58. #918 From an Inmarsat-C terminal, which of the following are correctly formatted address for sending TELEX messages to two Inmarsat-C terminals on vessels...
  59. #919 Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the AOR-E?
  60. #920 Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the POR?
  61. #921 Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the IOR?
  62. #922 Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to an Inmarsat-C terminal in the AOR-W?
  63. #923 Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to two Inmarsat-C terminals in the POR?
  64. #924 Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 45992 in...
  65. #925 Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside terminal number 276992 in New...
  66. #926 Which of the following are correctly formatted Inmarsat-C address book entries for sending communications to an F77 with a fax machine in the AOR-W?
  67. #927 Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine on a vessel’s F77 terminal i...
  68. #928 Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine on a vessel’s F77 terminal i...
  69. #929 How may an Inmarsat-C unit be used to send text communications to an Internet destination?
  70. #930 To send message traffic to an Internet address using an Inmarsat- C terminal -- what action would be required?
  71. #931 What menu function in Inmarsat-C terminals would typically be used to specify an Internet address destination?
  72. #932 Which of the following is NOT correct with regard to Inmarsat-C e-mail?
  73. #933 How would a notification of arrival be sent as a text to a mobile phone number using an Inmarsat-C unit?
  74. #934 How may Inmarsat-C terminals be used for sending Urgency or Safety priority communications (such as synoptic weather reports)?
  75. #935 Which statement is FALSE regarding an Inmarsat Distress request?
  76. #936 How may a Distress Alert be initiated to a specific RCC through Iridium?
  77. #937 How is an Iridium Distress alert routed to the correct RCC?
  78. #938 What is the best way to use Iridium to alert an RCC of a Distress and then follow-up with voice SAR communications?
  79. #939 Why is the correct selection of the LES in the Inmarsat-C Distress Alert Setup menu so crucial?
  80. #940 If an Inmarsat Distress Alert Setup menu contains an incorrect or unavailable LES code what happens to the Distress Alert transmission?
  81. #941 What action would be the swiftest and most certain way to notify a RCC of a Distress situation aboard your vessel?
  82. #942 What information should be sent in a detailed satellite Distress message that was not included in the initial “hot-key” Distress Alert?
  83. #943 What actions should be taken to transmit a detailed satellite Distress message to a RCC handling your vessel’s initial “hot-key” Distress Alert?
  84. #944 What is your vessel’s obligation upon receipt of a Distress priority EGC message requesting that vessels report in response to a SAR situation?
  85. #945 What statement is true regarding LES codes and Inmarsat “hot-key” alert default menus?
  86. #946 Detailed Distress situation report message formats can best be found in?
  87. #947 What can be defined as the service that allows terrestrial information providers to send general information messages to pre-defined groups of subscri...
  88. #948 What additional equipment provides the maximum availability for receiving SafetyNETTM broadcasts when the associated Inmarsat-C SES is engaged in comm...
  89. #949 Which of the following is utilized to transmit Enhanced Group Calls?
  90. #950 A vessel with an 18-hour ETA to the Panama Canal on a voyage from Miami loses the ability to communicate via Inmarsat-C. The most likely cause is?
  91. #951 A vessel, before transiting the Panama Canal, on a voyage from Hawaii to Florida, loses the ability to communicate via Inmarsat-C. The most likely cau...
  92. #952 What would cause an FBB antenna to lose constant lock on the satellite?
  93. #953 What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?
  94. #954 What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?
  95. #955 Which functions may the holder of a GMDSS Radio Operator License NOT perform on the Inmarsat-C equipment?
  96. #956 A vessel loses Inmarsat-FBB SES operation after a large course change. Which of the following could most likely cause this?
  97. #957 Which statement is correct regarding a method that a vessel experiencing problems with shadowing of an Inmarsat-FBB SES antenna by an on-board obstruc...
  98. #958 Which of the following conditions does not typically impair Inmarsat-FBB communications?
  99. #959 A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?
  100. #960 Which functions may the holder of a GMDSS Radio Operator License not perform on the Inmarsat-C equipment?

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.