单项选择题
LOW ABOUT 300 MILES SOUTHWEST OF LISBON 1004 MOVING SLWLY SOUTHEAST COMMA FILLING 1006 BY MIDNIGHT.This phrase is likely to be under the heading of（）.
A.GALE WARNING
B.24 HOURS FORECAST
C.GENERAL SITUATION
D.TROPICAL CYCLONE WARNING
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Information for updating nautical charts is primarily found in the（）.
A.Notice to Mariners
B.Coast Pilots
C.nautical chart catalogs
D.Sailing Directions -
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In revised editions of Admiralty charts the（）are corrected first．
A.smaller scales
B.larger scales
C.smaller scales and larger scales
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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
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C.large scale charts／small scale charts
D.small scale charts／large scale charts
