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

单项选择题Manoeuvring information can not be obtained from（）.

A.construction plans
B.sea trials
C.calculation estimates
D.SMS procedure file

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

A.relative humidity
B.air temperature
C.barometric pressure
D.absolute humidity

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

A.ISM
B.SOLAS
C.DOC
D.SMS

单项选择题The dew point temperature is（）.

A.always higher than the air temperature
B.always lower than the air temperature
C.equal to the difference between the wet and dry bulb temperatures
D.the temperature at which the air is saturated with water vapor

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

A.Tide Tables
B.Tidal Current Tables
C.Coast Pilot
D.Nautical Almanac