航海英语题库_航海学

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1、航海学10.1航海学基本知识[2651]______isthedistanceeastorwestmeasuredindegrees，minutesandsecondsofarcontheequatorbetweentheprimemeridianandthemeridianpassingthroughtheplace．A.LongitudeB.LatitudeC.HeightD.BearingKEY:A[2652]______referstotheanglebetweentrueNorthand

2、theheadinglineoftheship．A.TruepositionB.TruemeridianC.TruecourseD.TruebearingKEY:C[2653]Agnomonicprojectionisbasedona(n)______.A.planetangentatonepointB.cylindertangentattheequatorC.conetangentatoneparallelD.infiniteseriesofconestangentatselectedparal

3、lelsKEY:A[2654]Agreatcircletrackprovidesthemaximumsavingindistanceon______.A.easterlycoursesinhighlatitudesB.southerlycoursesinhighlatitudesC.westerlycoursesinlowlatitudesD.easterlycoursesinlowlatitudesthatcrosstheequatorKEY:A[2655]Alateralsystembuoyd

4、isplayingaquicklight______.A.shouldbepassedcloseaboardoneithersideB.indicatesthatspecialcautionisrequiredC.isusedatachannelbifurcationorjunctionD.ispaintedwithredandwhiteverticalstripesKEY:B[2656]Alightcharacteristicofcompositegroupflashingindicatesth

5、atthereisa(n)______.A.sharpturninthechannelB.narrowinginthechannelatthatpointC.junctioninthechannelD.obstructionthatmustbelefttoportKEY:C[2657]Alighthavingcharacteristicswhichincludecolorvariationsisdefinedas______.A.switchingB.alternatingC.oscillatin

6、gD.fluctuatingKEY:B[2658]Alightthathasalightperiodshorterthanitsdarkperiodisdescribedas______.A.flashingB.pulsatingC.occultingD.alternatingKEY:A[2659]Alightedpreferred-channelbuoymayshowa______.A.fixedredlightB.Morse(A)whitelightC.compositegroup-flash

7、inglightD.yellowlightKEY:C[2660]Alighthousecanbeidentifiedbyits______.A.paintedcolorB.lightcolorandphasecharacteristicC.typeofstructureD.AlloftheaboveKEY:D[2661]Alineofpositionformedbysightingtwochartedobjectsinlineiscalleda(n)______.A.relativebearing

8、B.rangelineC.tracklineD.estimatedpositionKEY:B[2662]AlineontheEarthparalleltotheequatorisa______.A.gnomoniccurveB.smallcircleC.meridianD.greatcircleKEY:B[2663]Amid-channelbuoy，iflighted，willshowa______.A.fixedredlightB.Morse(A)whitelightC.gree