单项选择题
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
An orange flag showing a black circle and square is a（）...
单项选择题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
