单项选择题
A mooring line is described as being 6x24，1-3/4 inch wire rope. What do the above numbersrefer to?（）
A.Strands，yarns，circumference
B.Strands，wires，diameter
C.Wires，yarns，diameter
D.Strands，circumference，wires
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Your 15-meter tug is underway and crossing a deep and narrow channel. A large container vessel is off your port bow on a steady bearing. Which statement is TRUE concerning this situation? （）.
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C.taking bearings of the lights
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