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

（）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 shall not the officers in charge of the navigational watch do?（）

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

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

A tide is called diurnal when（）.

The dew point temperature is（）.

Manoeuvring information can not be obtained from（）.

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

Full details of all lights and fog signals are shown on（）.