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Compass deviation is caused by ______.
A.magnetism from the earth’s magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
参考答案
更多 “ 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 ” 相关考题
考题
When an azimuth of the Sun has been taken and the deviation of the standard magnetic compass computed，the watch officer should record the results ______.A.in the vessel's Official LogbookB.on the compass deviation cardC.in the compass deviation logD.on a Napier diagram
考题
Permanent magnetism is caused by ______.A.operation of electrical equipment and generators on board shipB.the earth's magnetic field affecting the ship's hard iron during constructionC.the horizontal component of the earth's magnetic field acting on the horizontal soft ironD.the vertical component of the earth's magnetic field acting on the vertical soft iron
考题
A single vertical magnet placed underneath the compass in the binnacle is used to compensate for ______．A.The horizontal component of the permanent magnetismB.Deviation caused by the vessel's inclination from the verticalC.Induced magnetism in the horizontal soft ironD.Induced magnetism in the vertical soft iron
考题
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
考题
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
考题
If the compass heading and magnetic-heading are the same then ______.A.the deviation has been offset by the variationB.there is something wrong with the compassC.the compass is being influenced by nearby metalsD.there is no deviation on that heading
考题
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
考题
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
考题
Magnetic heading differs from compass heading by______．A.compass errorB.true headingC.variationD.Deviation
考题
单选题Deviation is caused by（）.A
changes in the earth's magnetic fieldB
nearby magnetic land masses or mineral depositsC
magnetic influence inherent to that particular vesselD
the magnetic lines of force not coinciding with the lines of longitude
考题
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
考题
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
考题
单选题Which statement about the Flinders bar of the magnetic compass is CORRECT（）.A
It compensates for the error caused by the vertical component of the Earth's magnetic fieldB
It compensates for error caused by the heeling of a vesselC
It compensates for quadrantal deviationD
It is only needed in equatorial waters
考题
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
考题
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
考题
单选题If the magnetic heading is greater than the compass heading，the deviation is（）.A
eastB
westC
northD
south
考题
单选题If the compass heading and the magnetic heading are the same then（）.A
the deviation has been offset by the variationB
there is something wrong with the compassC
the compass is being influenced by nearby metalsD
there is no deviation on that heading
考题
单选题During the transition of the Earth’s magnetic field _____.A
the compass will become uselessB
man and animals will be confused as to directionsC
the magnetic strength of the Earth will disappearD
the magnetic strength of the Earth will be stronger
考题
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
考题
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
考题
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
考题
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
考题
单选题The total magnetic effects which cause deviation of a vessel’s compass can be broken down into a series of components which are referred to as（）.A
divisional partsB
coefficientsC
fractional partsD
equations
考题
单选题Permanent magnetism is caused by（）.A
operation of electrical equipment and generators on board shipB
the earth's magnetic field affecting the ship's hard iron during constructionC
the horizontal component of the earth's magnetic field acting on the horizontal soft ironD
the vertical component of the earth's magnetic field acting on the vertical soft iron
考题
单选题The error in a magnetic compass caused by the vessel’s magnetism is called（）.A
variationB
deviationC
compass errorD
bearing error
考题
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
考题
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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