International distress signal in VHF calling for help is（）.

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 vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the ______.

A.distress position

B.spoken words “Mayday, Mayday, Mayday”

C.ship’s name

D.ship’s call letters

One of the signals, other than a distress signal, that can be used by a rescue boat to attract attention is a/an ______.

A.red star shell

B.searchlight

C.burning barrel

D.orange smoke signal

If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.

A.Calling frequency

B.Distress frequency

C.Urgency frequency

D.Working frequency

What is the most appropriate action for a GMDSS radio operator to take in a distress situation where immediate help is needed，but the vessel is not sinking nor needs to be abandoned ________．

A.Switch off EPIRB and SART manually

B.Transmit distress call by MF/HF，VHF or INMARSAT

C.Notify the RCC（Rescue Coordination Center）through VHF FM on channel 13

D.Transmit distress call by activating the radiotelegraph automatic alarm signal

An orange flag showing a black circle and square is a ______.

A.signal indicating a course change

B.distress signal

C.signal of asking to communicate with another vessel

D.signal indicating danger

You are using VHF channel 16 (156.8 MHz) or 2182 KHz. You need help but are not in danger. You should use the urgent signal ______.

A.ASSISTANCE NEEDED

B.PAN-PAN

C.MAYDAY

D.SECURITE