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

（）is where the crew eat their meals.

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

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

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

（）is on the panel of radar.

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

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

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

The loading of the ship must be done in accordance with（）.