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

Manoeuvring information can not be obtained from（）.

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

The ISM code is part of（）.

The helm command PORT TWENTY means（）.

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

It is dangerous for vessels without the operational radar（）the estuary.

（）is where the crew eat their meals.

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

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