单选题Which action should you take after sending a false distress alert on VHF?（）A Send a DSC cancellation message on Ch-70B Make a voice announcement to cancel the alert on Ch-16C Make a voice announcement to cancel the alert on Ch-13D Make a voice announce

While proceeding to a distress site，you hear the words “Seelonce mayday” on the radiotelephone．Which action should you take ________．

A.Resume base course and speed as your assistance is no longer required

B.Acknowledge receipt and advise your course，speed，and ETA

C.Relay the original distress message as no other vessel has acknowledged it

D.Monitor the radiotelephone but do not transmit

Which action should be taken on receipt of a GMDSS distress alert ________．

A.Read the display screen and/or printout

B.Silence the alarm

C.Listen for any follow up voice/telex transmission on the appropriate frequency

D.All of the above

29． Which of the following is NOT true?

A． The test is the most important for a student．

B． After class ,you should review what you have learned．

C． You should listen to your teacher and take notes carefully in class．

D． When you plan your time ,you should think of the time for eating ,sleeping and so on

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

You are steaming in a westerly direction along the Gulf Coast．You see ahead of you a lighted buoy showing a red isophase light．Which action should you take ________．

A.Alter course to port and leave the buoy to starboard

B.Alter course to starboard and leave the buoy to port

C.Alter course and leave the buoy near by on either side

D.Alter course and pass the buoy well-off on either side

You are testing the external inflation bladder on an immersion suit and find it has a very slow leak．Which action should be taken ________．

A.Replace the suit

B.Replace the inflation bladder

C.Take it out of service and repair in accordance with the manufacturers instructions

D.Some leakage should be expected and a topping off tube is provided; no other action is necessary

When sending emails to professionals, you should take the time to check your message for spelling errors and to proofread your text.()

In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should ______.

A.stop your engines

B.sound the danger signal at two-minute intervals

C.hold course and speed until the other vessel is sighted

D.take avoiding action as soon as possible