单项选择题

Which space cannot be deducted from gross tonnage when calculating net tonnage（）.

A.Crew messroom
B.Forepeak ballast tank
C.Master's cabin
D.Chain locker

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单项选择题

Which of the following tensioning devices is used with webbing to secure light vehicles aboard Ro-Ro vessels（）.

A.Chain lever
B.Buckle tensioner
C.Adjust-a-matic tensioner
D.Turnbuckle

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