单项选择题
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
相关考题
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单项选择题
What is the primary equipment for receiving MSI? （）
A.SART
B.EPIRB
C.NAVTEX
D.INMARSAT-B -
单项选择题
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 -
单项选择题
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
