A tide is called diurnal when（）.

（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.

Where would you find information about the time of high tide at a specific location on a particular day of the year?（）

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

When the wave period and the apparent rolling period are the same（）.

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（）.

How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）

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

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

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