單項(xiàng)選擇題What would NOT be a distress signal?()

A.MAYDAY sent by radiotelephone
B.Continuous sounding of fog horn
C.Green star shells fired from a launcher
D.Square flag and ball in a vertical line


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1.單項(xiàng)選擇題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

2.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

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

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

4.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

5.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