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

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

Manoeuvring information can not be obtained from（）.

A tide is called diurnal when（）.

The mean draft of a ship is the draft（）.

Bales close to the deckhead should be covered to prevent（）.

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

Which of the following is not a form of precipitation?（）

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

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（）.