期航海学二三副Fortyfour voyages two and three.docx

期航海学二三副Fortyfour voyages two and three.docx

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期航海学二三副Fortyfourvoyagestwoandthree

44期航海学二三副916（Forty-fourvoyagestwoandthree）

Forty-fournauticalstudiesof_916

No.2/3of500grosstonsandabovevesselsincoastalnavigationareas

（1pointforeachquestion,100questions）

1.Whenthecalculationofprecisionishigherinnavigation,theearthisusuallytreatedas:

A,spheroid

B,ellipsoid

C,ellipsoid

D,irregulargeometry

Answer:

B

Geographicallongitudeandgeographicallatitudearebasedonthe_____.

A,thesphereoftheearth

B,theearthellipsoid

C,earthellipsoid

D,sphericalrectangularcoordinatesystem

Answer:

B

3.Thedirectionofthewarpandweftdirectionisdeterminedaccordingto_____.

A,thedirectionofthedeparturepointrelativetothepointofarrival

B,thepointofarrivalrelativetothedeparturepoint

C.Thegeographicalcoordinatesofthestartingpoint

D,thegeographicalcoordinatesofthearrivalpoint

Answer:

B

4,40°Nphiatsomepointontheearth,lambda=120°E,itissymmetricaltothecenteroftheearthpointis:

A,40°S,philambda=120°W

B,40°Sphi,lambda=120°E

40°N,C,philambda=060°W

40°S,D,philambda=060°W

Answer:

D

5.Whichofthefollowingisadefiniteprobleminestablishingthegeodeticcoordinatesystem?

Ⅰ,determinetheellipsoidparameters;Ⅱ,locatethecenteroftheellipsoid;Ⅲ,determinethedirectionoftheaxis

A,Ⅰ,Ⅱ

B,Ⅰ,Ⅲ

C,Ⅱ,Ⅲ

D,Ⅰ,Ⅱ,Ⅲ

Answer:

D

Thelawofthecirculardirectionofthehalfcircleis:

A,inSEsemicircle,circleisequalto180°withsemicirclereadings

B,intheNEsemicircle,circleisequalto360°minusthesemicirclereadings

C,inSWsemicircle,circumferenceis180°,semicirclereadings

D,inNWsemicircle,circumferenceis270°,semicirclereadings

Answer:

C

7.ThesideAngleis:

A,theAnglebetweenthefirstandlastlinetothetargetline

B,objectdirection

C,trueheadingminustruedirection

D,theAngleofthetruenorthtothebearingline

Answer:

A

8,ashipsudraheading140°,sudra2°E,themeasuredsomethingtuocompassbearing350°,thenthetargetAngleis:

A,210°

B,152°totheleft

Cand148°totheleft

D,212°

Answer:

A

9,ashipheading045°,thegeomagnetic2°W,1°Ecompass,theshipleftbeamtargettruebearingasfollows:

A,314°

B,316°

Cand135°

D,134°

Answer:

A

10,onewheelby44°Nsailsouthwardalongthemeridian,poorlogreadingsof240',deltaL=0%,regardlessofoutsideinfluencesandnavigationerror,etc.,hasarrivedinthelatitudeof_____.

A,equalto40°N

Bandmorethan40°N

C,lessthan40°N

D.Can'tbesure

Answer:

C

11.TheheightofthesettingobjectisH（unit:

m）,andtheheightoftheobserverise（unit:

m）.Intheory,theobservercanseethehorizontaldistanceD,（unit:

nmile）for_____.

A,2.09

B,2.09

C,2.09+2.09

D,2.20

Answer:

A

12.WhichofthefollowingfactorsdoesthebeacontowerrangeoftheChinesechartsandcharts?

A,highlight

B.Lightintensity

C,groundcurvature

D.theactualeyeheightoftheobserver

Answer:

D

Thespeedofwateristhespeedoftheshipin_____.Ⅰ,noromantic;Ⅱ,havenoflowwind;Ⅲ,flowwithoutwind;Ⅳ,romantic

A,onlyⅠ

B,Ⅰ~Ⅳ

C,Ⅰ,Ⅱ,Ⅳ

D,Ⅰ,Ⅱ

Answer:

B

14,asailingship,therelativelogtypechangerateoftheship,deltaL=0%,theseaareahastheflow,thevelocityis2kn,thedistanceofthelogafter1his:

A,0'0.

B,a+2'0.

C,2'-.0

D.Itdependsonthewindandflowdirectionoftheseaarea

Answer:

A

15.Onthemertograph,agraphiconthegraphissimilartothatontheground.

A,graphicswithAcertainarea

B,infinitesimalgraphics

C,anysizeofthegraph

D,graphicswithintheentiremap

Answer:

B

Thelimitaccuracyofthescaleofthedrawingerrorinchartpaintingisnomorethan0.1mm,andthescaleis1:

10000.

A,5m

B,10m

C,15m

D,2m

Answer:

B

EqualAngletransversecylindricalprojection,orgauss-klugprojection,isoftenusedtodrawinsailing:

A,hemispherestarmap

B,largecirclechart

C,Mercatorseacharts

D,largescaleharborplan

Answer:

D

Theshipsaresailingalongthecoastandalongthecoast,usuallyusingtheconstantrouteline,whichisbecause:

AandtheMercatorchartisAstraightline,theshortestroutebetweentwopoints

B,sailingontheconstantdirectionline,theshipiseasytooperateandhaslittleimpactonthevoyage

C,constantdirectionlineisequalAngleroute,andcanmaintaintheequiangularcharacteristicsofthechart

Dandtheconstant-directionlinecanbekeptinlinewiththeincreasingofthelatitude

Answer:

B

19.TheincreasingrateoflatitudeofeachparallelintheMercatorchartis:

A,fixed

B.Changewithlongitude

C,changewithlocalscale

D,changewiththescaleofchartscale

Answer:

A

Thefollowingstatementaboutgaussprojectionisincorrect:

A,usetheearth