Lines on a chart which connect points of equal magnetic variation are called ______.A.magnetic latitudesB.magnetic declinationsC.dipD.isogonic lines
Lines on a chart which connect points of equal magnetic variation are called ______.
A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines
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Assignable cause or special variation is:A . is indicated when a point falls outside the control limits.B . is indicated when a point falls outside the specification limits.C . is indicated when a run of seven or more points fall above the center line of a standard control chart.D . is indicated when a run of seven or more points fall below the center line of a standard control chart.E . A, C, and D.
134 Assignable cause or special variation is:A. is indicated when a point falls outside the control limits.B. is indicated when a point falls outside the specification limits.C. is indicated when a run of seven or more points fall above the center line of a standard control chart.D. is indicated when a run of seven or more points fall below the center line of a standard control chart.E. A, C, and D
A revised print of a chart is made ______.A.after every major hydrographic survey of the area covered by the chartB.when there are numerous corrections to be made or the corrections are extensiveC.when a low-stock situation occurs and minor corrections are madeD.every two years to update the magnetic variation information
The agonic line on an isomagnetic chart indicates the ______.A.magnetic equatorB.magnetic longitude reference lineC.points where there is no variationD.points where there is no annual change in variation
The compass rose on a nautical chart indicates both variation and ______.A.deviationB.annual rate of variation changeC.precessionD.compass error
Isogonic lines are lines on a chart indicating ______.A.points of equal variationB.points of zero variationC.the magnetic latitudeD.magnetic dip
How is the annual rate of change for magnetic variation shown on a pilot chart? ______.A.Gray lines on the uppermost inset chartB.Red lines on the main body of the chartC.In parenthesis on the lines of equal magnetic variationD.Annual rate of change is not shown
Your vessel is proceeding down a channel，and you see a pair of range lights that are in line dead ahead．The chart indicates that the direction of this pair of lights is 229°T，and variation is 6°W．If the heading of your vessel at the time of the sighting is 232°per standard magnetic compass，what is the correct deviation ________．A.3°EB.9°EC.3°WD.9°W
An isotherm is ______.A.a line on a weather map connecting equal points of both temperature and pressureB.an instrument that measures the climatological effects of temperatureC.a line connecting points of equal barometric pressure on a weather mapD.a line connecting points of equal temperature on a weather map
Compass error is equal to the ______.A.deviation minus variationB.variation plus compass courseC.combined variation and deviationD.difference between true and magnetic heading
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
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
单选题Deviation is caused by（）.Achanges in the earth's magnetic fieldBnearby magnetic land masses or mineral depositsCmagnetic influence inherent to that particular vesselDthe magnetic lines of force not coinciding with the lines of longitude
单选题Isogonic lines are lines on a chart indicating （）.Apoints of equal variationBpoints of zero variationCthe magnetic latitudeDmagnetic dip
单选题A revised print of a chart is made （）.Aafter every major hydrographic survey of the area covered by the chartBwhen there are numerous corrections to be made or the corrections are extensiveCwhen a low-stock situation occurs and minor corrections are madeDevery two years to update the magnetic variation information
单选题If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE? （）ACompass error and variation are equalBCompass north will be true northCVariation will equal deviationDThere will be no compass error
单选题Lines on a chart which connect points of equal magnetic variation are called （）.Amagnetic latitudesBmagnetic declinationsCdipDisogonic lines
单选题How is the annual rate of change for magnetic variation shown on a pilot chart?（）AGray lines on the uppermost inset chartBRed lines on the main body of the chartCIn parenthesis on the lines of equal magnetic variationDAnnual rate of change is not shown
单选题Which information is found in the chart title（）.AA rhumb line appears as a straight lineBDistance is measured at the midlatitude of the track lineCMeridians appear as curved lines converging toward the nearer poleDParallels，except the equator，appear as curved lines
单选题Which information does the outer ring of a compass rose on a nautical chart provide（）.AvariationBtrue directionsCmagnetic directionsDannual rate of variation change
单选题The compass rose on a nautical chart indicates both variation and （）.AdeviationBannual rate of variation changeCprecessionDcompass error
单选题Variation is the angular measurement between（）.Acompass north and magnetic northBcompass north and true northCmagnetic meridian and the geographic meridianDyour vessel's heading and the magnetic meridian
单选题What is the basic principle of the magnetic compass（）.AMagnetic materials of the same polarity repel each other and those of opposite polarity attractBThe Earth's magnetic lines of force are parallel to the surface of the EarthCMagnetic meridians connect points of equal magnetic variationDThe compass needle（s）will，when properly compensated，lie parallel to the isogonic lines of the Earth
单选题The line which connects the points of zero magnetic dip is（）.AAn agonic lineBThe magnetic equatorCA magnetic meridianDAll of the above
单选题A line on a weather chart connecting places which have the same barometric pressure is called an（）.AisothermBisallobarCisobarDisotope
单选题The points on the earth’s surface where the magnetic dip is 90° are（）.AAlong the magnetic equatorBConnected by the isoclinal lineCThe isoporsDThe magnetic poles
单选题Compass error is equal to the（）.Adeviation minus variationBvariation plus compass courseCcombined variation and deviationDdifference between true and magnetic heading