A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines
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A.complete and often very poor surveys
B.correct and often very good surveys
C.inadequate and often very old surveys
D.adequate and present surveys
A.equipment's
B.tools
C.apparatus
D.aids
A.with
B.in
C.by
D.to
最新試題
Which information does the outer ring of a compass rose on a nautical chart provide（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
Which aid is NOT marked on a chart with a magenta circle? （）
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（）.
The soundings on the chart are based on the depth of water available at （）.
The shoreline on charts generally represents the mean（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）
On a Mercator chart，1 nautical mile is equal to（）.
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（）.
The only cylindrical chart projection widely used for navigation is the （）.