The loading of the ship must be done in accordance with（）.

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

A.great convenience
B.finding true north
C.magnetic characteristics
D.simplicity and reliability

单项选择题Which of the following is not an operation mode of AIS?（）

A.A ship-to-ship mode
B.A ship-to-shore mode
C.Integrated with a vessel traffic system
D.Sending out information through broadcast automatically

单项选择题（）is where the crew eat their meals.

A.The funnel
B.The messroom
C.The galley
D.The satellite antenna

单项选择题When the wave period and the apparent rolling period are the same（）.

A.synchronous rolling occurs
B.roll period decreases
C.roll period increases
D.roll amplitude is dampened

单项选择题In the Northern hemisphere northerly winds may cause temperature（）.

A.falling
B.rising
C.constant
D.same