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单选题
When entering a channel from seaward，the numbers on buoys（）.
A
are the same as their Light List number
B
are marked in 6 inch figures with retroreflective material
C
increase with the even numbers to starboard
D
decrease with the odd numbers to starboard
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单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）A
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考题
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考题
单选题When can routine communications be resumed when radio silence has been imposed?（）A
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单选题Fuel oil tank vents are fitted with a screen which will stop（）.A
oil from flowing out of the tank ventB
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flames on deck from entering the tank vent
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单选题Entering from sea,a daymark on the port side of the channel would be indicated on a chart by a（）.A
red triangle with the letter RB
white triangle with the letters RGC
green square with the letter GD
white square with the letter GR
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odd or even numbersB
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单选题When landing a lifeboat through heavy surf with a strong current running parallel to the beach (from right to left when facing from seaward) the recommended procedure is to（）.A
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drop an anchor outside the surf line，then pay out anchor line over the bow while the seas carry the boat toward the beachC
approach slow enough so that the boat can be brought around to meet breaking seas on the bowD
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one system having odd numbers while the other system has even numbersC
one system using horizontal bands while the other system uses vertical stripesD
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单选题When steering a tow downstream around the shape of a sand bar，and staying on the proper side of the buoys，an operator should be cautious of（）.A
eddies under the barB
swift current under the bar causing loss of controlC
cross-currents pushing the tow away from the barD
cross-currents pushing the tow into the bar
考题
单选题On entering from seaward，a starboard side daymark will（）.A
show a fixed red light if lightedB
show a Morse (A) white lightC
be square in shapeD
have an even number if numbered
考题
单选题The changes in the channel’s sands and buoys on this coast are（）this chart can not be considered as a safe guide of the channel.A
frequentB
so frequentC
frequent thatD
so frequent that
考题
单选题Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）A
FlashingB
Quick flashingC
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Equal interval (isophase)
考题
单选题When cutting wire rope，seizings are put on each side of the cut.The seizings prevent the wire from unlaying and also（）.A
Maintain the original balance of the tension in the wires and strandsB
Prevent moisture from entering between the wires at the cut endC
Forces lubricant from the core to protect the raw，cut endD
All of the above
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