单项选择题
A.red flares B.smoke signals C.sound signals D.Any of the above
By regulation，orange smoke distress signals will expire...
单项选择题By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）
A.24 months B.36 months C.42 months D.54 months
At night you observe a vessel ahead show three flashes ...
单项选择题At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.
A.in distress B.approaching a bend in the channel C.operating astern propulsion D.intending to overtake another vessel
AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTH...
单项选择题AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTHER ANNOUNCEMENT. I ASK YOU KINDLY TO REMAIN CALM. THERE IS NO DANGER AT THIS TIME. These words are likely from（）.
A.the captain of a vessel in distress B.representative of ship owners C.an officer from port authorities D.the pilot of a vessel entering a port in foreign country
