单项选择题

You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear（）.

A.Speech
B.Signaling tones
C.A busy signal
D.All of the above

相关考题

Do you require any further assistance ? My ship is safe...

单项选择题Do you require any further assistance ? My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.

A.salvage operation
B.cargo discharging
C.bunkering
D.towing operation

（）both anchors.A.DragB.DredgeC.WeighD.Lie

单项选择题（）both anchors.

A.Drag
B.Dredge
C.Weigh
D.Lie

The control of distress traffic is the responsibility o...

单项选择题The control of distress traffic is the responsibility of（）.

A.the owners
B.the charterers
C.the shipper
D.the vessel in distress or of the station that relays the distress message

VHF通信

You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear（）.