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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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
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
A.SART
B.EPIRB
C.NAVTEX
D.INMARSAT-B
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
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
最新試題
Which statement concerning the navigation of a vessel in ice is FALSE?（）
You are on a multiple-product chemical tanker with orders to load diethylamine. What is NOT a requirement for transporting this cargo?（）
Which topic is NOT required to be discussed at the pre-transfer conference?（）
Which emergency is required to be covered at the required periodic drills on a fishing vessel?（）
Winds expected to（）Storm Force 10 in south-east semicircle later up to 300 miles from the center of the tropical cyclone.
Which action(s) should the operator of a pedestal crane take if crane control is lost?（）
Which action(s) is/are included in crane operations?（）
You are underway and pass by a lighthouse. Its light，which was white since you first sighted it，changes to red. This means（）.
Which statement about transmitting distress messages by radiotelephone is INCORRECT?（）
Which equipment is not a source of locating signals?（）