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

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

The helm command PORT TWENTY means（）.

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

Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.

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（）.

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

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

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

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