单项选择题
What fitting on the mast works in conjunction with the shrouds to control side bend of the mast?（）
A.Chainplate B.Hound C.Crowfoot D.Spreader
单项选择题 What does the term end-for-end refer to in regard to a wire towing hawser?（）
单项选择题 What can be used to measure the percentage of oxygen inside a chain locker?（）
单项选择题 What best describes an anchor buoy?（）
