单项选择题
A.compass error B.true heading C.variation D.deviation
My gyro-compass（）is two degrees east.A.troubleB.errorC....
单项选择题My gyro-compass（）is two degrees east.
A.trouble B.error C.wrong D.mistake
Your ship is steaming at night with the gyropilot engag...
单项选择题Your ship is steaming at night with the gyropilot engaged. You notice that the vessel’s course is slowly changing to the right. Which action should you take FIRST?（）.
A.Notify the engine room of the steering malfunction B.Change to hand steering C.Call the Master D.Send the Quartermaster to the emergency steering station
The principal purpose of adjustment of the magnetic com...
单项选择题The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.
A.variation B.compass error C.deviation D.earth's magnetic force
