单项选择题

In revised editions of Admiralty charts the（）are corrected first．

A.smaller scales
B.larger scales
C.smaller scales and larger scales
D.moderate scales

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单项选择题

Generally，（）are used as the track charts on the high sea，（）are used for harbors，inland waters and coastal areas．

A.Mercator charts／Loran charts
B.Admiralty charts／Routeing charts
C.large scale charts／small scale charts
D.small scale charts／large scale charts

单项选择题

For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?（）

A.Plotting radio bearings over a long distance
B.Determining latitude and longitude of a fix
C.Measuring rhumb line distances
D.Measuring rhumb line directions

单项选择题

Fog is most commonly associated with a(n)（）.

A.warm front at night
B.low pressure area
C.anticyclone
D.lack of frontal activity