Which of the following shall not the officers in charge of the navigational watch do?（）

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

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

A tide is called diurnal when（）.

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

Berthing means bringing a vessel to her berth until（）.

The circulation around a low pressure center in the Northern Hemisphere is（）.

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

Full details of all lights and fog signals are shown on（）.

The dew point temperature is（）.