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单选题
Preferred channel marks are colored with（）．
A
black and green bands
B
red and green bands
C
red and yellow bands
D
yellow and green bands
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单选题A red triangular daymark marks（）.A
the centerline of a navigable channelB
the starboard side of a channelC
a prominent object of navigational interest that has no lateral significanceD
area of a channel where passing another vessel is permitted
考题
单选题Entering from seaward，triangular-shaped daymarks are used to mark（）.A
the starboard side of the channelB
the centerline of the channelC
an obstruction where the preferred channel is to starboardD
special purpose areas
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单选题When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.A
a junction with the preferred channel to the leftB
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单选题A preferred-channel buoy will show a（）.A
white light whose characteristic is Morse (A)B
group-occulting white lightC
composite group-flashing (2 + 1) white lightD
composite group-flashing (2 + 1) red or green light
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单选题A preferred-channel buoy may be（）.A
letteredB
sphericalC
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All of the above
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单选题When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.A
the shape of an unlighted buoyB
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whether the number is odd or even
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单选题Preferred channel buoys indicate the preferred channel to transit by（）.A
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单选题When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.A
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单选题Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy（）.A
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单选题Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）A
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