单项选择题
Which of the following is a characteristic of a Ro-Ro vessel（）.
A.Passenger tours available upon docking B.Long port stays necessary to secure vehicles C.Short in port turnaround times D.Heavy vehicles only require lightweight securing equipment
单项选择题 Which arrangement of shell plating is used most in modern shipbuilding（）.
单项选择题 When using the term limber system one is referring to a（）.
单项选择题 When lowering manropes alongside a stage rigged over the side of a vessel，they should be allowed to trail in the water（）.
