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
How is the annual rate of change for magnetic variation shown on a pilot chart? ______.
A.Gray lines on the uppermost inset chart
B.Red lines on the main body of the chart
C.In parenthesis on the lines of equal magnetic variation
D.Annual rate of change is not shown
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听力原文：Banks change their base rates fairly infrequently.(5)A．Banks often change their base rate.B．Banks seldom change their base rate.C．Banks never change their base rate.D．Banks change their base rate at regular intervals.
The annual change in______is －0.2 degree east in this water area.A.mean high waterB.marine insuranceC.magnetic variationD.maritime accident
A pilot chart does NOT contain information about ______.A.average wind conditionsB.tidal currentsC.magnetic variationD.average limits of field ice
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
Lines on a chart which connect points of equal magnetic variation are called ______.A.magnetic latitudesB.magnetic declinationsC.dipD.isogonic lines
The annual change in ______ is 0.2 degree．A.Magnetic VariationB.Marine InsuranceC.Maritime AccidentD.Mean High Water Spring
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
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The agonic line on an isomagnetic chart indicates the （）.Amagnetic equatorBmagnetic longitude reference lineCpoints where there is no variationDpoints where there is no annual change in variation
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Magnetic variation changes with a change in（）.Athe vessel's headingBsea conditionsCseasonsDthe vessel's position
单选题How does a vessel’s rate of turn change when entering shallow water?（）AIt is fasterBIt is slowerCThere is no changeDIt remains constant for varying propeller revolutions
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 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The principal purpose of magnetic compass adjustment is to（）.Areduce the variation as much as possibleBreduce the deviation as much as possibleCreduce the magnetic dip as much as possibleDallow the compass bowl to swing freely on its gimbals
单选题How is variation indicated on a small-scale nautical chart?（）.AMagnetic compass tableBMagnetic meridiansCIsogonic linesDVariation is not indicated on small-scale nautical charts
单选题Compass error is equal to the（）.Adeviation minus variationBvariation plus compass courseCcombined variation and deviationDdifference between true and magnetic heading