The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.

The ISM code is part of（）.

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

（）is on the panel of radar.

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

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

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

（）is where the crew eat their meals.

The company should establish and maintain procedures to control all documents and date which are relevant to（）.

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