The helm command PORT TWENTY means（）.

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

A tide is called diurnal when（）.

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

（）is where the crew eat their meals.

What is a CORRECT reply to a pilot’s request, How’s your heading?（）

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

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

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

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