A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
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A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
最新試題
Compass deviation is caused by（）.
An ECDIS is required to display which information?（）
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
How is variation indicated on a small-scale nautical chart?（）.
A Doppler log in the volume reverberation mode indicates（）.
Deviation in a compass is caused by the（）.
An electronic depth finder operates on the principle that（）.
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.