单项选择题

No oil or mixture containing oil（）into Singapore waters from any vessel.

A.shall not be discharged
B.shall be discharged
C.shall be filled
D.shall not be filled

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单项选择题

In view of（）bilge water from any vessel，an application shall be made to Harbor Authorities for approval．

A.discharging
B.recircling
C.loading
D.taking in

单项选择题

In towing，chocks are used to（）.

A.protect the towline from chafing
B.secure the end of the towline on the tug
C.stop off the towline while retrieving it
D.absorb shock loading on the towline