单项选择题
You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates（）.
A.you are in the vicinity of the ICW
B.the buoy is a special mark
C.the buoy is off station
D.the buoy designates a sharp turn in the channel
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You are drifting in a locale where there is no current．As a rule，your vessel will lie（）.
A.Bow to the wind
B.Beam to the wind
C.Stern to the wind
D.With the wind on the quarter -
单项选择题
You are approaching a vertical lift bridge.You know the span is fully open when（）.
A.Three white lights in a vertical line are lit
B.A red light starts to flash at about 60 times a minute
C.A yellow light is illuminated on the bridge pier
D.There is a range of green lights under the lift span -
单项选择题
Which vessel would display a cone，apex downward（）.
A.A fishing vessel with outlying gear
B.A vessel proceeding under sail and machinery
C.A vessel engaged in diving operations
D.A vessel being towed
