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

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

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

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

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（）.

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

The dew point temperature is（）.

Which of the following is not an operation mode of AIS?（）

Manoeuvring information can not be obtained from（）.

（）is on the panel of radar.