A.Entrance buoy
B.New buoy
C.Port buoy
D.Cardinal buoy
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A.wingdam
B.towhead
C.cutoff
D.landwall
A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
A.white light whose characteristic is Morse (A)
B.group-occulting white light
C.composite group-flashing (2 + 1) white light
D.composite group-flashing (2 + 1) red or green light
A.lettered
B.spherical
C.showing a white light
D.All of the above
A.the equator
B.a great circle
C.a small circle
D.a meridian
最新試題
A nun buoy will（）.
A spherical buoy may be（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
How is the intensity of a light expressed in the Light Lists?（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A white buoy with an orange rectangle on it displays（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
Branford reef is（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A vessel is（）when she is not at anchor，made fast to the shore，or aground.