单项选择题
A.The catenary in a hawser should be sufficient so that the hawser just touches the bottom
B.The hawser is of sufficient length for towing when taut between tug and tow
C.Increasing speed usually increases the catenary in the hawser
D.Shortening the tow hawser generally decreases the maneuverability of the tug
单项选择题 Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）
单项选择题 Which statement concerning maneuvering in restricted visibility is FALSE?（）.
单项选择题 Which statement concerning an automatic towing engine is FALSE? （）