The mean draft of a ship is the draft（）.

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

The helm command PORT TWENTY means（）.

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

（）is where the crew eat their meals.

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

（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.

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（）.

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

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