A tide is called diurnal when（）.

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

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

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

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

The ISM code is part of（）.

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

（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.

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（）.