A.flashing
B.pulsating
C.occulting
D.alternating
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A.switching
B.alternating
C.oscillating
D.fluctuating
A.sharp turn in the channel
B.narrowing in the channel at that point
C.junction in the channel
D.obstruction that must be left to port
A.should be passed close aboard on either side
B.indicates that special caution is required
C.is used at a channel bifurcation or junction
D.is painted with red and white vertical stripes
A.easterly courses in high latitudes
B.southerly courses in high latitudes
C.westerly courses in low latitudes
D.easterly courses in low latitudes that cross the equator
A.plane tangent at one point
B.cylinder tangent at the equator
C.cone tangent at one parallel
D.infinite series of cones tangent at selected parallels
最新試題
A white buoy with an open-faced orange diamond on it indicates（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
How is the intensity of a light expressed in the Light Lists?（）.
An orange and white buoy marking a danger area will have what symbol on it?（）
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A nun buoy will（）.
A yellow buoy may exhibit a(n)（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.