A、White；red
B、Red； white
C、Red； green
D、Green ；red
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A、Please turn on cargo lights. B、Please fix cargo lights. C、Please turn on hatch lights. D、Please fix hold lights.
A、flashing amber light B、yellow light with the same characteristics as the sternlight C、all-round yellow light D、yellow light with the same characteristics as the masthead light
A、A. Lower the derrick, please. B、B. Top the derrick, please. C、C. Swing the derrick, please. D、D. Adjust the derrick, please.
A、Please have the damaged derrick readjusted. B、Please have the damaged derrick repaired. C、Please have the damaged derrick painted. D、Please have the damaged derrick brushed.
A、the intensity of the light B、checking the period and characteristics against the Light List C、the color，because the buoy will have only a red or a green light D、Any of the above can be used to identify the light
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