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

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

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

Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）

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

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

The ISM code is part of（）.

Shipboard Emergency Drills must be carried out at least（）on board cargo ship.

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

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