A tide is called diurnal when（）.

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

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

The company should establish and maintain procedures to control all documents and date which are relevant to（）.

ECDIS must be able to perform all of the following EXCEPT（）.

The dew point temperature is（）.

In the Northern hemisphere northerly winds may cause temperature（）.

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

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

Shipboard Emergency Drills must be carried out at least（）on board cargo ship.