航海英語磁羅經(jīng)與陀螺羅經(jīng)的使用單項選擇題每日一練(2019.01.15)

單項選擇題
Magnetic dip is a measurement of the angle between the（）.
A.geographic pole and the magnetic pole
B.lubber's line and true north
C.horizontal and the magnetic line of force
D.compass heading and the magnetic heading
單項選擇題
Quadrantal error in a gyrocompass has its GREATEST effect（）.
A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
單項選擇題
The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.
A.north magnetic pole
B.south magnetic pole
C.magnetic prime vertical meridian
D.magnetic equator
單項選擇題
The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.
A.deviation
B.variation
C.compass error
D.dip
單項選擇題
If the magnetic heading is greater than the compass heading，the deviation is（）.
A.east
B.west
C.north
D.south