单项选择题
A.shock loading on the tow line is reduce
B.towing speed is improved
C.the vessel is more visible from the tug
D.the catenary of the tow line is reduced
单项选择题 In order to back a right-handed，single-screw vessel in a straight line，you will probably need to use（）.
单项选择题 In order for a vessel to be engaged in fishing she must be（）.
单项选择题 In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to（）.