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

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

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

Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）

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

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

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

According to the relevant regulation, lifeboat should be powered by（）.

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

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