A.the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume
B.the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume
C.the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo
D.All of the above

A.the office staff
B.the terminal staff
C.the ship's crew
D.the insurance company

A.stretches too much
B.is too difficult to make fast
C.parts too readily
D.is too susceptible to mildew

A.is too expensive for everyday towing usage
B.binds on the cleats
C.parts too readily
D.strethes too much

A.placing bunker on the deck
B.building a stage on which to place the cargo
C.welding steel feet to the deck, on which the cargo is placed
D.erecting vertical pillars under the deck to support the cargo