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

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

（）is where the crew eat their meals.

Berthing means bringing a vessel to her berth until（）.

ECDIS must be able to perform all of the following EXCEPT（）.

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

Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.

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

The dew point temperature is（）.

（）is on the panel of radar.