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

Bales close to the deckhead should be covered to prevent（）.

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

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

（）is on the panel of radar.

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

Manoeuvring information can not be obtained from（）.

The mean draft of a ship is the draft（）.

（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.

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