What is it called when it is possible to ignite the vapour above the oil?（）

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

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.

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

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

A tide is called diurnal when（）.

The helm command PORT TWENTY means（）.

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

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