Before any loading takes place any signs of the previous cargo should do（）.

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

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

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

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

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

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

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

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

（）is on the panel of radar.