A.variation
B.true directions
C.magnetic directions
D.annual rate of variation change
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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
A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
最新試題
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
Which chart symbol indicates the bottom is clay（）.
The shoreline on charts generally represents the mean（）.
The survey information upon which a chart is based is found （）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
The short-long dashed magenta line around Gardiners Island marks（）.
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（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
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（）.
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?（）