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Magnetic information on a chart may be ______.
A.found in the center(s) of the compass rese(s)
B.indicated by isogonic lines
C.found in a note on the chart
D.All of the above
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A pilot chart does NOT contain information about ______.A.average wind conditionsB.tidal currentsC.magnetic variationD.average limits of field ice
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Magnetic information on a chart may be ______.A.found in the center(s) of the compass rose(s)B.indicated by isogonic linesC.found in a note on the chartD.All of the above
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On a nautical chart，the inner ring of a compass rose indicates ______.A.true directionsB.compass errorC.deviationD.magnetic directions
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Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west ________．A.Heeling magnetB.Flinders barC.Fore-and-aft magnetsD.All of the above can be set on magnetic east or magnetic west headings
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Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south ________．A.Quadrantal spheresB.Heeling magnetsC.Flinders barD.Fore-and-aft magnets
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Compass deviation is caused by ______.A.magnetism from the earth’s magnetic fieldB.misalignment of the compassC.magnetism within the vesselD.a dirty compass housing
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Deviation in a compass is caused by the ______.A.vessel’s geographic positionB.vessel’s headingC.earth’s magnetic fieldD.influence of the magnetic materials of the vessel
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Error may be introduced into a magnetic compass by ______.A.making a structural change to the vesselB.a short circuit near the compassC.belt bucklesD.All of the above
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How is variation indicated on a small-scale nautical chart?______.A.Magnetic compass tableB.Magnetic meridiansC.Isogonic linesD.Variation is not indicated on small-scale nautical charts
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If a magnetic compass is not affected by any magnetic field other than the Earth’s which statement is TRUE?______.A.Compass error and variation are equalB.Compass north will be true northC.Variation will equal deviationD.There will be no compass error
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Magnetic dip is a measurement of the angle between the ______.A.geographic pole and the magnetic poleB.lubber’s line and true northC.horizontal and the magnetic line of forceD.compass heading and the magnetic heading
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单选题Compass deviation is caused by（）.A
magnetism from the earth's magnetic fieldB
misalignment of the compassC
magnetism within the vesselD
a dirty compass housing
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单选题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 poleB
south magnetic poleC
magnetic prime vertical meridianD
magnetic equator
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单选题Deviation in a compass is caused by the（）.A
vessel's geographic positionB
vessel's headingC
earth's magnetic fieldD
influence of the magnetic materials of the vessel
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单选题If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE? （）A
Compass error and variation are equalB
Compass north will be true northC
Variation will equal deviationD
There will be no compass error
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单选题The survey information upon which a chart is based is found （）.A
at the top center of the next lineB
near the chart titleC
at the lower left cornerD
at any convenient location
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单选题Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.A
Heeling magnetB
Flinders barC
Fore-and-aft magnetsD
All of the above can be set on magnetic east or magnetic west headings
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单选题The lubber’s line of a magnetic compass（）.A
always shows true north directionB
indicates the vessel's headingC
is always parallel to the vessel's transomD
is located on the compass card
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单选题Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.A
Quadrantal spheresB
Heeling magnetsC
Flinders barD
Fore-and-aft magnets
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单选题Which information does the outer ring of a compass rose on a nautical chart provide（）.A
variationB
true directionsC
magnetic directionsD
annual rate of variation change
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单选题Variation in a compass is caused by（）.A
worn gears in the compass housingB
magnetism from the earth's magnetic fieldC
magnetism within the vesselD
lack of oil in the compass bearings
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单选题Error may be introduced into a magnetic compass by（）.A
making a structural change to the vesselB
a short circuit near the compassC
belt bucklesD
All of the above
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单选题What is an advantage of the magnetic compass aboard vessels?（）A
Compass error is negligible at or near the earth's magnetic polesB
It does not have to be checked as oftenC
It is reliable due to it's essential simplicityD
All points on the compass rose are readily visible
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单选题What is the basic principle of the magnetic compass（）.A
Magnetic materials of the same polarity repel each other and those of opposite polarity attractB
The Earth's magnetic lines of force are parallel to the surface of the EarthC
Magnetic meridians connect points of equal magnetic variationD
The compass needle（s）will，when properly compensated，lie parallel to the isogonic lines of the Earth
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单选题The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.A
variationB
compass errorC
deviationD
earth's magnetic force
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单选题The error in a magnetic compass caused by the vessel’s magnetism is called（）.A
variationB
deviationC
compass errorD
bearing error
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单选题Magnetic information on a chart may be （）.A
found in the center(s) of the compass rose(s)B
indicated by isogonic linesC
found in a note on the chartD
All of the above
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