单项选择题
he heel block is located（）.
A.at the base of the boom
B.at the cargo hook
C.near the midships guy
D.near the spider band
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相关考题
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单项选择题
The disadvantage of using three strand nylon line for towing is its（）.
A.inherent weakness
B.tendency to rot if left damp
C.danger to crew if it parts
D.strength and shock absorbing abilities -
单项选择题
The correct way to make an eye in a wire rope with clips is to place the clips with the（）.
A.first and third U-bolts on the bitter end and the second U-bolt on the standing part
B.first and third U-bolts on the standing part and the second U-bolt on the bitter end
C.U-bolts of all clips on the bitter end
D.U-bolts of all clips on the standing part -
单项选择题
The catenary in a towline is（）.
A.a short bridle
B.the downward curvature of the hawser
C.another name for a pelican hook
D.used to hold it amidships
