A.wingdam
B.towhead
C.cutoff
D.landwall
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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
A.the equator
B.a loxodromic curve
C.a small circle
D.a meridian
最新試題
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
Buoys which mark isolated dangers are painted with alternating（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A white buoy with an orange rectangle on it displays（）.
How is the intensity of a light expressed in the Light Lists?（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A preferred-channel buoy will show a（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.