A.A rhumb line appears as a straight line
B.Distance is measured at the midlatitude of the track line
C.Meridians appear as curved lines converging toward the nearer pole
D.Parallels，except the equator，appear as curved lines
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A.variation
B.true directions
C.magnetic directions
D.annual rate of variation change
A.Cly
B.Cla
C.Cl
D.C
A.In the Coast Pilot
B.In the Nautical Almanac
C.In the List of Lights
D.In the Sailing Directions
A.Feet
B.Yards
C.Fathoms
D.Meters
A.fish trap areas
B.naval exercise areas
C.underwater cables
D.recommended track lines
最新試題
The survey information upon which a chart is based is found （）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
What defines a great circle? （）
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
The shoreline on charts generally represents the mean（）.
The path that a vessel is expected to follow，represented on a chart by a line drawn from the point of departure to the point of arrival，is the（）.
Which information is found in the chart title（）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）