Which of the following choices does not depict the tank inerting process on a tank vessel?
the introduction of oxygen into a gas free tank prior to entry
the introduction of inert gas into a gas free tank with the objective of reducing the oxygen content to below 8% by volume
the introduction of inert gas into a cargo tank during cargo discharge operations to replace the volume of discharged carg
the introduction of nitrogen gas into a tank with the objective of reducing the oxygen content to below 8% by volume
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