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

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

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

（）is on the panel of radar.

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

What is it called when it is possible to ignite the vapour above the oil?（）

（）is where the crew eat their meals.

Which of the following is not a form of precipitation?（）

The ISM code is part of（）.

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