單項選擇題A chart with a scale of 1:80,000 would fall into the category of a().

A.sailing chart
B.general chart
C.coastal chart
D.harbor chart


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1.單項選擇題A chart projection depicting the poles and a small area on either side of a connecting meridian,that is sometimes used for star charts,is the().

A.Azimuthal gnomonic projection
B.Lambert conformal projection
C.Transverse Mercator projection
D.Polyconic projection

2.單項選擇題A chart position enclosed by a square is a(n)().

A.fix
B.estimated position
C.dead reckoning position
D.running fix

3.單項選擇題()is not a position-fixing system.

A.Hifix
B.Hyperfix
C.Trisponder
D.WGS84

4.單項選擇題Which aid is NOT marked on a chart with a magenta circle? ()

A.Aero light
B.Radar station
C.Radar transponder beacon
D.Radiobeacon

5.單項選擇題When using a Lambert conformal chart in high latitudes,angles such as bearings are measured in reference to ().

A.the meridian through the object of the bearing
B.the meridian through the ship's position
C.the meridian midway between the ship and the object
D.any meridian