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


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1.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

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

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

3.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

4.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

5.單項選擇題When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.

A.a straight line drawn on the chart approximates a great circle
B.the chart should not be used outside of the standard parallels
C.the course angle is measured at the mid-longitude of the track line
D.distance cannot be measured directly from the chart