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

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

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

When steering by autopilot,how often should the steering be checked?（）

The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.

Manoeuvring information can not be obtained from（）.

（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.

Where would you find information about the time of high tide at a specific location on a particular day of the year?（）

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

A tide is called diurnal when（）.