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單項選擇題

A chart with a natural scale of 1:160，000 is classified as a（）.

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

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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

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

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