The approval period for a shipboard Oil Pollution Emergency Plan expires after（）.

If an emergency pump control is used as the emergency shutdown on a tank vessel，it must（）.

In an emergency，the electro-hydraulic steering units can be directly controlled by the（）.

On offshore drilling units，emergency lighting and each emergency power system must be tested at least once a（）.

Shipboard Oil Pollution Emergency Plans must be reviewed（）.

A vessel sailing from Liverpool to New York puts into Boston，Mass. for emergency repairs. If no inward foreign cargo is to be discharged at that port，which of the following documents is required?（）

Each emergency generator on a mobile offshore drilling unit，when tested，must be run under a full load for at least（）.

The deck water seal of the inert gas system（）.

After having activated the emergency position indicating radio beacon，you should（）.

The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.