单项选择题
A change of a documented vessel’s name can only be made by the（）.
A.American Bureau of Shipping B.Commissioner of Customs C.Treasury Department D.Coast Guard
单项选择题 A chain bridle is used when towing astern because it（）.
单项选择题 A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.
单项选择题 A celestial body’s complete orbit around another body is（）.
