According to the relevant regulation, lifeboat should be powered by（）.

The ISM code is part of（）.

It is dangerous for vessels without the operational radar（）the estuary.

How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）

Manoeuvring information can not be obtained from（）.

A tide is called diurnal when（）.

The loading of the ship must be done in accordance with（）.

Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.

Fog is likely to occur when there is little difference between the dew point and the（）.

Before any loading takes place any signs of the previous cargo should do（）.