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單項(xiàng)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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單項(xiàng)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(xiàng)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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