deviation
annual rate of variation change
precession
compass error
第1题：
Magnetic information on a chart may be ______.
A.found in the center(s) of the compass rose(s)
B.indicated by isogonic lines
C.found in a note on the chart
D.All of the above
第2题：
The numeral in the center of a wind rose circle on a pilot chart indicates the ______.
A.total number of observations
B.average wind force on the Beaufort scale
C.average wind force in knots
D.percentage of calms
第3题：
On a mercator chart, 1 nautical mile is equal to ______.
A.1 minute of longitude
B.1 degree of longitude
C.1 minute of latitude
D.1 degree of latitude
第4题：
______ is a digitized“picture”of a chart．
A.Vector chart format
B.Raster chart data
C.pixel
D.Electronic Nautical Chart
第5题：
On a nautical chart，the inner ring of a compass rose indicates ______.
A.true directions
B.compass error
C.deviation
D.magnetic directions
第6题：
The compass rose on a nautical chart indicates both variation and ______.
A.deviation
B.annual rate of variation change
C.precession
D.compass error
第7题：
Information for updating nautical charts is primarily found in the ______.
A.Notice to Mariners
B.Coast Pilots
C.nautical chart catalogs
D.Sailing Directions
第8题：
On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector ______.
A.indicates the limits of the navigable channel
B.indicates a danger area
C.is used to identify the characteristics of the light
D.serves no significant purpose
第9题：
Your vessel is proceeding down a channel，and you see a pair of range lights that are in line dead ahead．The chart indicates that the direction of this pair of lights is 229°T，and variation is 6°W．If the heading of your vessel at the time of the sighting is 232°per standard magnetic compass，what is the correct deviation ________．
A.3°E
B.9°E
C.3°W
D.9°W
第10题：
How is variation indicated on a small-scale nautical chart?______.
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts