The dew point temperature is（）.

The ISM code is part of（）.

（）is on the panel of radar.

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

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

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

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

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

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

It is dangerous for vessels without the operational radar（）the estuary.