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Magnetic compass deviation______.
A.varies depending upon the bearing used
B.is the angular difference between magnetic north and compass north
C.is published on the compass rose on most nautical charts
D.is the angular difference between geographic and magnetic meridians
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更多 “ Magnetic compass deviation______.A.varies depending upon the bearing usedB.is the angular difference between magnetic north and compass northC.is published on the compass rose on most nautical chartsD.is the angular difference between geographic and magnetic meridians ” 相关考题
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Which one of the followings is incorrect about magnetic compass?______.A.The magentic compass is compulsory on my vesselB.The magentic compass is prone to errorC.The magentic compass is always placed inside steel constructionsD.The magentic compass needs to be calibrated to compensate for local magnetic distortion
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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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Deviation is the angle between the ______.A.true meridian and the axis of the compass cardB.true meridian and the magnetic meridianC.magnetic meridian and the axis of the compass cardD.axis of the compass card and the degaussing meridian
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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 heading differs from compass heading by______.A.compass errorB.true headingC.variationD.Deviation
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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Deviation is the angle between the().A
true meridian and the axis of the compass cardB
true meridian and the magnetic meridianC
magnetic meridian and the axis of the compass cardD
axis of the compass card and the degaussing meridian
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单选题The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is().A
deviationB
variationC
compass errorD
dip
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单选题As a vessel changes course to starboard,the compass card in a magnetic compass().A
remains aligned with compass northB
also turns to starboardC
first turns to starboard then counterclockwise to portD
turns counterclockwise to port
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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 greatest directive force is exerted on the magnetic compass when the().A
needles are nearly in line with the meridianB
vessel is near the magnetic polesC
variation is near zeroD
vessel is near the magnetic equator
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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Variation is the angular measurement between().A
compass north and magnetic northB
compass north and true northC
magnetic meridian and the geographic meridianD
your vessel's heading and the magnetic meridian
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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The principal purpose of magnetic compass adjustment is to().A
reduce the variation as much as possibleB
reduce the deviation as much as possibleC
reduce the magnetic dip as much as possibleD
allow the compass bowl to swing freely on its gimbals
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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The lubber’s line on a magnetic compass indicates().A
compass northB
the direction of the vessel's headC
magnetic northD
a relative bearing taken with an azimuth circle
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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 magnetic compass operates on the principle that().A
like magnetic poles attractB
unlike magnetic poles repelC
unlike poles attractD
the poles of the compass line up with the geographic poles of the earth
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单选题ECDIS must be able to perform all of the following EXCEPT().A
determine true bearing and distance between two geographical pointsB
determine magnetic compass deviationC
transform a local datum to the WGS-'84 datumD
convert graphical coordinates to display coordinates
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单选题The compass error of a magnetic compass that has no deviation is().A
zeroB
equal to variationC
eliminated by adjusting the compassD
constant at any geographical location
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单选题Magnetic compass deviation().A
varies depending upon the bearing usedB
is the angular difference between magnetic north and compass northC
is published on the compass rose on most nautical chartsD
is the angular difference between geographic and magnetic meridians
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