單項(xiàng)選擇題If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.

A.vessel not under command
B.sailing vessel
C.vessel in distress
D.vessel being towed


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1.單項(xiàng)選擇題If you log a distress message，it must include the（）.

A.sea state
B.names of witnesses
C.time of its occurrence
D.wind direction and velocity

2.單項(xiàng)選擇題If you are transmitting a distress message by radiotelephone you should（）.

A.use English language
B.always use the International Code
C.preface it by the word "Interco"
D.follow the transmission with the radio alarm signal

3.單項(xiàng)選擇題How is “radio silence” imposed?（）

A.By the On Scene Coordinator (OSC)
B.By the Coast Earth Station (CES) controlling the distress communications on that frequency
C.It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel
D.It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel

4.單項(xiàng)選擇題Distress signals may be（）.

A.red flares
B.smoke signals
C.sound signals
D.Any of the above

5.單項(xiàng)選擇題Distress flares and smoke signals for small passenger vessels（）.

A.are not required aboard vessels on runs of less than 30 minutes duration
B.must be Coast Guard approved and stowed in a portable，watertight container
C.must be marked with an expiration date not more than 42 months from the date of manufacture
D.All of the above