单项选择题
What would most likely prevent a SART’s signal from being detected?（）
A.Signal absorption by the ionosphere
B.Heavy sea swells
C.The rescue personnel were monitoring the 10-cm radar
D.The rescue personnel were monitoring the 3-cm radar
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相关考题
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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 -
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
