GIVE DISTRESS SIGNALS FOR IDENTIFICATION.的意思是：发出遇险求救信号。

______ is the most visible signal of distress from a lifeboat at sea in the daytim

A.Smoke signal

B.Flash signal

C.Fire signal

D.Radio emergency transmission

________is the most visible signal of distress from a lifeboat at sea in the daytime.

A.Smoke signal

B.Flash signal

C.Fire signal

D.Radio emergency transmission

A．transmit distress signal

B．send response signal

C．transmit the signal of ship‟s position

D．be start by X-band radar

Which is NOT a distress signal ().

A.A continuous sounding with any fog signal apparatus

B.A signal sent by radiotelephone consisting of the spoken word Mayday

C.An International Code Signal of N.

D.The firing of green star rockets or shells

A．Smoke signal

B．Flash signal

C．Fire signal

D．Radio emergency transmissio

International distress signal in VHF calling for help is________.

A.Help,Help,Help

B.Mayday,Mayday,Mayday

C.Save,Save,Save

D.Rescue,Rescue,Rescue

A．red flare

B．smoke

C．sound signals

D．any of above

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

A.red star shell

B.searchlight

C.burning barrel

D.orange smoke signal

Continuous sounding of a fog whistle by a vessel is a signal ______.

A.that the vessel is anchored

B.to request the draw span of a bridge to be opened

C.of distress

D.that the vessel is broken down and drifting