The ISM code is part of（）.

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

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

A tide is called diurnal when（）.

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

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

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

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

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

The helm command PORT TWENTY means（）.