單項(xiàng)選擇題What is the primary purpose for Digital Selective Calling (DSC)?（）

A.DSC provides reception of weather and navigational warnings plus search and rescue information
B.DSC provides low-cost，routine communications for the vessel operator
C.DSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radio
D.This aids SAR authorities in tracking a vessel's position by satellite


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1.單項(xiàng)選擇題What is the primary equipment for receiving MSI? （）

A.SART
B.EPIRB
C.NAVTEX
D.INMARSAT-B

2.單項(xiàng)選擇題What is the MOST important thing you should do before transmitting on a marine radio? （）

A.Ask for permission
B.Record the time in your radio log
C.Press the push to talk button three times
D.Monitor the channel to insure that it is clear

3.單項(xiàng)選擇題What is a “Special Warning”? （）

A.An urgent message concerning a vessel in distress
B.A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels
C.A broadcast disseminating an official government proclamation affecting shipping
D.A radio navigational warning concerning a particularly hazardous condition affecting navigation

4.單項(xiàng)選擇題What does a SART signal sound or look like?（）

A.It transmits "SOS" and the vessel's name and position in slow speed Morse Code
B.It will appear on a radar unit's PPI as a line of dots radiating outward with the innermost dot indicating the SART's position
C.It will appear on a radar unit's PPI as a line of dots radiating outward with the outermost dot indicating the SART's position
D.None of the above

5.單項(xiàng)選擇題The radiotelephone safety signal is（）.

A.securite repeated 3 times
B.safety repeated 3 times
C.pan pan repeated 3 times
D.securite securite repeated 3 times