A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle
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A.always shows true north direction
B.indicates the vessel's heading
C.is always parallel to the vessel's transom
D.is located on the compass card
A.deviation
B.variation
C.compass error
D.dip
A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error
A.needles are nearly in line with the meridian
B.vessel is near the magnetic poles
C.variation is near zero
D.vessel is near the magnetic equator
A.induced magnetism in vertical soft iron
B.induced magnetism in horizontal soft iron
C.permanent magnetism in ship's steel
D.vessel's inclination from the vertical
最新試題
Which statement about the gyrocompass is FALSE（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
When changing from a compass course to a true course you should apply（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
What is the basic principle of the magnetic compass（）.
The Flinders bar on a magnetic compass compensates for the（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
This induced magnetism（）the permanent magnetism already present in the ship.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.