航海英语6050之--10航海学

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1、航海英语6050之--10航海学十航海学10.1航海学基本知识[2651]______isthedistanceeastorwestmeasuredindegrees，minutesandsecondsofarcontheequatorbetweentheprimemeridianandthemeridianpassingthroughtheplace．A.LongitudeB.LatitudeC.HeightD.BearingKEY:A[2652]______referstotheanglebetweentrueNorthandtheheadingli

2、neoftheship．A.TruepositionB.TruemeridianC.TruecourseD.TruebearingKEY:C[2653]Agnomonicprojectionisbasedona(n)______.A.planetangentatonepointB.cylindertangentattheequatorC.conetangentatoneparallelD.infiniteseriesofconestangentatselectedparallelsKEY:A[2654]Agreatcircletrackprovidest

3、hemaximumsavingindistanceon______.A.easterlycoursesinhighlatitudesB.southerlycoursesinhighlatitudesC.westerlycoursesinlowlatitudesD.easterlycoursesinlowlatitudesthatcrosstheequatorKEY:A[2655]Alateralsystembuoydisplayingaquicklight______.A.shouldbepassedcloseaboardoneithersideB.in

4、dicatesthatspecialcautionisrequiredC.isusedatachannelbifurcationorjunctionD.ispaintedwithredandwhiteverticalstripesKEY:B[2656]Alightcharacteristicofcompositegroupflashingindicatesthatthereisa(n)______.A.sharpturninthechannelB.narrowinginthechannelatthatpointC.junctioninthechannel

5、D.obstructionthatmustbelefttoportKEY:C[2657]Alighthavingcharacteristicswhichincludecolorvariationsisdefinedas______.A.switchingB.alternatingC.oscillatingD.fluctuatingKEY:B[2658]Alightthathasalightperiodshorterthanitsdarkperiodisdescribedas______.A.flashingB.pulsatingC.occultingD.

6、alternatingKEY:A[2659]Alightedpreferred-channelbuoymayshowa______.A.fixedredlightB.Morse(A)whitelightC.compositegroup-flashinglightD.yellowlightKEY:C[2660]Alighthousecanbeidentifiedbyits______.A.paintedcolorB.lightcolorandphasecharacteristicC.typeofstructureD.AlloftheaboveKEY:D[2

7、661]Alineofpositionformedbysightingtwochartedobjectsinlineiscalleda(n)______.A.relativebearingB.rangelineC.tracklineD.estimatedpositionKEY:B[2662]AlineontheEarthparalleltotheequatorisa______.A.gnomoniccurveB.smallcircleC.meridianD.greatcircleKEY:B[2663]Amid-channelbuoy，iflighted，

8、willshowa______.A.fixedredlightB.Morse(A