D. Wait until the coast station sends his Traffic List
58. Which characters are sent by the shore station to in dicate that it has shifted control to and that it is awaiting instructions from the vessel?
A.WRU B.GA+ C. KKKK D. \
59. What are the characters that are transmitted to terminate a direct telex connection in NBDP operation? A.\ B. KKKK C. END + D. EOM
60. Of the following, which is true of ARQ mode direct printing radioteletype transmission? A. Each data block consists of three characters B. The acceptance code consists of three characters C. A continuous data stream is transmitted D. Forward error correction reduces the number of errors 61. Which of the following is true of ARQ mode? A. This is an interactive mode
B. Each character is repeated three times C. Each character is transmitted twice D. This mode is generally used to broadcast messages
62. Which of the following keystrokes or characters is sent as part of ARQ communications to request a direct telex call to a shore-based location? A. \B. \C. \D. \
63. The sequence ARQ,CFEC, SFEC best corresponds to which of the following sequences? A. One-way communications to a single station, one-way communications to all stations, two-way communications
B. One-way communications to all stations, two-way communications, one-way communications to a single station
C. Two way communications, one-way communications to all stations, one-way communications to a single station D. Two way communications, One way communications to a single station, One way communications to all stations
64. If the vessel is beyond-range of NAVTEX broadcasts and the Inmarsat-C system fails, the GMDSS operator must: . A. Select 518 kHz ARQ telex on the MF/HF console to receive MSI
B. Request repairs of the Inmartsat-C Sat-C system and wait until within range of NAVTEX C. Select an HF MSI frequency and FEC telex mode to receive MSI D. Select 518 kHz FEC telex on the MF/HF console^to receive MSI
65. At mid-night, what would be the best choice in atleinptmg to communicate, using NBDP with a shore station some 800 miles (1,287 km) distant? A. VHF-FM
B. Communications is impossible at this distance C. HF bands
D. Higher UHF bands
66. Which statement is correct? A. FEC requests are first acknowledged by the vessel's transmitter before broadcasts can be received B. FEC mode broadcasts can be received without the transmitter being turned on C. None of these D. Weather broadcasts are always made in ARQ mode
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67. Which of the following is NOT a NBDP frequency?
A.8,376.5 kHz B.4,177.5 kHz C.2,174.5kHz D.6,312kHz. 68. The ARQ mode should be applied . A. when two stations communicate with each other B. in any radio system and at any time
C. when one ship sends a message to another station D. for communication among some stations 69. DSC is used primarily to . A. Receive weather warnings, navigational notices and other marine safety information B. Provide routine communications with the ship owner
C. Transmit and receive distress, urgent and safety alerts to and from other ships and shore stations via radio D. Report ship' s position to search-and-rescue authorities via satellite
70. When operating in coastal waters (sea area Al), a GMDSS-equipped vessel must; . A. Maintain a continuous DSC watch on 8 ,514.5 kHz B. Maintain a continuous aural watch on 2,182 kHz
C. Maintain a continuous DSC watch on VHF Channel 16 D. Maintain a continuous DSC watch on VHF Channel 70
71. A vessel certified for service in Sea Area A-2 is required to maintain watch on? A.2,174.5 kHz B.2,187.5 kHz C.2,182.0 kHz D. 2,738.0 kHz 72. A valid MMSI number for a DSC call to a specific group of vessels is: . A.003664523 B.030327931 C.338462941 D.003036483
23. VHF-DSC transmissions are encoded and transmitted in what emission mode? A. H3E B.FJB/J2B C.A3E D. None of the above.
74. Which of the following statements concerning DSC equipment is true? A. The GMDSS Radio Operator is responsible for properly selecting HF DSC guard channels B. All equipment must be type accepted
C. The vessel's navigational position must be updated, either automatically or manually, no less often that every four (4) hours D. All of the above
75. A DSC Distress alert; . .
A. Must always be sent on VHF CH70
B.Must always be sent on MF 2 MHz plus one other HF DSC frequency C.Will always be sent on one or more of the DSC distress frequencies D.Must always be sent on VHF CH70, then 2 MHz MF then 8 MHz HF 76. How many total frequencies are available for DSC distress alerting? A. One (1) B. Two (2) C. Five (5) D. Seven (7)
77. Which of the following watches must a compulsory vessel maintain when sailing in Sea Area A3 ? A. A continuous DSC watch on 8,414.5 kHz plus one other HF DSC frequency B. A continuous DSC watch on 2,187. 5 kHz C. A continuous DSC watch on CH70 D. All of above
78. Which of the following are the MF/HF DSC Distress watch frequencies? A. 2,177.5, 4,210.0, 6,314.0, 8,416.5,12,579.0, 16,806.5 B. 2,182.0, 4,125.0, 6,215.0, 8,291.0, 12,290.0, 16,420.0 C. 2,187.5 , 4,207.5 , 6,312.0 , 8,414.5, 12,577.0, 16,804.5 D. 2,174.5, 4,177.5, 6,268.0, 8,376.5, 12,520.0, 16,695.0
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79. Repetition of a DSC Distress call is normally automatic if not acknowledged after a delay of: A. 1 - 2 minutes B.2- 5 minutes C. 3.5 - 4.5 minutes D. Not at all
80. You send a VHF-DSC distress alert. What channel do you use for the follow-on voice transmission? A. CH12 B.CH70 C. CH13 D. CH16
81. You send a HF-DSC alert on 8 ,414.5 kHz. What frequency do you use for the voice transmission? A.8,376.5 kHz B.8,291.0kHz C.8,401.5kHz D. 8,201.0kHz 82. Under what conditions would you relay a DSC distress alert? A. If the mobile unit in distress is incapable of further Distress Alert communications B. If no Coast Station/Mobile Unit acknowledgement is observed C. Answers A and B are both possible D. You should never relay such an alert-the Coast Station & RCC will do that 83. Which channel is designated for GMDSS Digital Selective Calling? A. CH06 B.CH13 C. CH16 D. CH70 84. Mariners can use DSC for .
A. general communication B. distress alerting and safety calling C. receiving MSI D. both B and C
85. If a DSC distress relay is transmitted from a coast station, it will . A. indicate the ship in distress that the alert has been received
B. alert ships in the area of a distress incident that a distress has occurred C. inform other coast stations of distress incident D. repeat the distress alert in 5 minutes
86. Ship-to-ship distress alerting should be conducted by . A. Inmarsat MES B. VHF/DSC or MF/DSC
C. SART and VHF/DSC D. Satellite EPIRB and VHF/DSC
87. DSC distress acknowledgements are normally transmitted by___ in respond to a received DSC distress call.
A. Ship stations B. Coast stations C. NCSs D. NCC 88. The effectiveness of VHF communications is maximized by . A. The adjustment of squelch for maximum receiver sensitivity B. Appropriate setting of the \C. Selecting an appropriate channel D. All of the above
89. A VHF frequency channel pair of TX 157. 200 MHz and RX 161. 800 MHz would most likely be: _____? A. A Public Correspondence Coast Radio Station frequency B. Simplex C. Duplex D. Both A and C are correct
90. Which of the following numbers indicates a ship station MMSI? : A.003372694 B..623944326 C.030356328 D.3384672 9l. Which of the following statements concerning MMSI is true? A. Coast station MMSI numbers have 9 digits starting with 4 B. All MMSI numbers are 9 digits and contain an MID
C. Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal D. Group MMSI numbers must begin with 2 zeros
92. Which of the following statements concerning MMSI is true? A. All Coast Station MMSI must begin with 2 zeros
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B. The first 3 digits of a ship MMSI comprise the MID
C. A group call must begin with a single zero followed by the MID D. All of the above
93. What number will a ship station use to identify itself using NBDP? A. Four digit selcall
B. Five digit selcall or 9 digit MMSI number C. 7 digit Inmarsat-A ID number D. 9 digit Inmarsat-C ID number 94. What is the MID?
A. Mobile Identification Number B. Maritime Identification Digits C. Marine Indemnity Directory D. Mobile Interference Digits 95. ITU Channel 1604 would mean; . A. Channel 4 in the 16 MHz band
B. 1604 is the Channel number. It has no relevance to frequency bands C. Channel 1604 in the MF band D. Channel 16 in the 4 MHz band
96. Choose the most correct statement about the D layer. . A. This layer exists only during darkness
B. This layer exists only during daylight hours C. Reflects medium frequencies D. Density varies vdiurnally, seasonally and over the sunspot cycle
Part Four The Maritime Safety Information System 1. The broadcast system of MSI will be made by? A. NAVTEX B. EGC C. HF NBDP D. A + B + C
2. In each NAVTEX message there is a technical code (B1B2B3B4). Which character is the station identification?
A. B1 B.B2 C. B3 D. B4
3. The Inmarsat Safety NET Service covers .
A. A3 B.A2 + A3 C.A1 +A2+A3 D. Al + A2 + A3 + A4 .
4. In each NAVTEX message there is a technical code (B1B2B3B4). Which character is the identification of the information subject?
A. B1 B. B2 C. B3 D. B3B4
5. The Maritime safety information contains .
A. Distress message B. Ordinary message C. Distress alert D. Navigational warnings 6. The broadcast of MSI will be made .
A. continuously B. in terrestrial system C. in satellite system D. Both B and C 7. Which of the following statement is correct? A. 2,185kHz is used exclusively for MSI through the NAVTEX system. B. 518 kHz is used exclusively for MSI through the NAVTEX system C. 2,175 kHz is used exclusively for MSI through the NAVTEX system D. 8,375kHz is used extensively for MSI through the NAVTEX system
8. Which of the following statements about the charges for Safety Net services is correct? A. there is no charges to the mariner for receipt of safety net messages B. safety net messages are charged by connection time C. safety net messages are charged by Mbits transmitted
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D. B or C
9. The priority of all navigational warnings and meteorological forecasts is ___.
A. safety priority B. urgent priority , C. distress priority D. ship business priority 10.How many NAVAREAS are there in the world? A.4 B. 8 C. 16 D. 24
11.Which one of the following frequencies is used for International NAVTEX Service? A.518 kHz B.490 kHz C.2,187.5 kHz D.4,209.5 MHz
12.Which of the following messages can be rejected by NAVTEX receiver? A. Navigational warnings B. Meteorological warnings C. Search and rescue information D. Meteorological forecast 13.Each NAVTEX message begins with starts of message function . A. NNNN B. KKKK C.ZCZC D. NCNC
14.How to reduce the risk of interference between transmitters with the same Bl character in different parts of the world? A. NAVTEX broadcasting is operated on a time-sharing basis B. The power of each transmitter is regulated C. A and B D. A or B
15: What is the drum speed of a station if the Index of Co-operation is 576? A. 90 B. 60 C. 240 D. 120
16. Which of the following equipment on board is not used to broadcast Maritime Safety Information? A. NAVTEX B. EGC C. HF NBDP D. HF DSC
17. Which of the following frequency is not used for NAVTEX service? A. 518 kHz B. 490 kHz C. 2,187.5 kHz D. 4,209.5 MHz
18. It is possible for ships to receive safety message transmitted by Navtex station . A. in any Inmarsat regions B. in each NAVTEX area C. at any distance D. in Area A3 and A4
19. A Navtex station in each NAVAREA is usually allowed to have for transmission. A. 10 minutes every 4 hours B. half an hour every other hour C. irregular period of time D. 5 minutes every two hours
20. The quality of EGC messages is affected by the time of reception and climate condi?tions. A. sometimes B. all times C. never D. partly 21. The priority of EGC messages is classified by . A. distress, urgent and safety B. safety and routine
C. urgent, safety and routine D. distress, urgent, safety and routine
22. Within the area of Inmarsat coverage, receives MSI via Safety Net service. A. EGC receiver B. NAVTEX receiver C. VHF R/T D. MF/HF radio telephone
23. Ships sailing in____are able to receive and print out EGC messages. A. a fixed area or Navarea in any ocean region B. a Navarea or weather forecast area
C. any designated area or given geographic position under the Inmarsat satellites D. anywhere of the world
24.___means navigational and meteorological warnings, meteorological forecasts and other urgent safety related messages broadcast to ships. A. Navigational broadcast B. Weather forecast
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