Before any loading takes place any signs of the previous cargo should do（）.

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

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

What is a CORRECT reply to a pilot’s request, How’s your heading?（）

The dew point temperature is（）.

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

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

Which of the following is not an operation mode of AIS?（）

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

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