An oil tanker operating with dedicated clean ballast tanks shall be equipped with（），approved by the Administration on the basis of specification recommended by the Organization，to enable supervision of the oil content in ballast water being discharged.

Cargo booms must be weight tested to recertify the Safe Working Load (SWL) every（）.

The（）should ensure that the holds in which chemical packages are stowed are properly supervised during the loading operations and these packages are regularly inspected for leakage or damage on the voyage.

The pneumatic containers which store bulk dry mud additives and cement on a ship are called（）.

It’s（）to stow optional cargo in the lower hold．You’d better give it block stowage in the tweendecks，then it can be easily discharged either at Shanghai，or Dalian or Tianjin.

In observing rig motion while under tow，the period of roll is the time difference between（）.

In securing deck loads for an ocean tow，drill pipe should be（）.

When fruit is carried as refrigerated cargo，the most frequent cause of its being infected at the discharge port is（）.

When loading bulk liquid cargo，what is the FIRST action you should take if a cargo valve jammed open?（）

If a cargo of kerosene were considered too lean to explode，then it must be（）.