39. A mercator chart is a ______

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• Distance along a track line is measured on a Mercator chart by using the （）.

  A、latitude scale near the middle of the track line B、longitude scale near the middle of the track line C、latitude scale at the multitude of the chart D、latitude or longitude scale at the middle of the scale

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• The revision date of a chart is printed on which area of the chart? （）

  A、Top center B、Lower-left corner C、Part of the chart title D、Any clear area around the neat line

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• A chart with a natural scale of 1:160，000 is classified as a（）.

  A . sailing chart B . general chart C . coast chart D . harbor chart

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• What area of the earth cannot be shown on a standard Mercator chart（）.

  A . Equator B . Areas including both North and South latitudes C . North and South Poles D . A narrow band along the central meridia

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• 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（）.

  A . Azimuthal gnomonic projection B . Lambert conformal projection C . Transverse Mercator projection D . Polyconic projectio

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• A revised print of a chart is made （）.

  A、when there are numerous corrections to be made or the corrections are extensive B、when a low-stock situation occurs and minor corrections are made C、every two years to update the magnetic variation information D、after every major hydrographic survey of the area covered by the chart

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• 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 chart

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• The survey information upon which a chart is based is found （）.

  A . at the top center of the next line B . near the chart title C . at the lower left corner D . at any convenient locatio

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• Which aid is NOT marked on a chart with a magenta circle? （）

  A . Aero light B . Radar station C . Radar transponder beacon D . Radiobeaco

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• A Mercator chart is a （）.

  A、cylindrical projection B、simple conic projection C、polyconic projection D、rectangular projection

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• For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?（）

  A . Plotting radio bearings over a long distance B . Determining latitude and longitude of a fix C . Measuring rhumb line distances D . Measuring rhumb line directio

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• A line of position formed by sighting two charted objects in line is called a(n)（）.

  A . relative bearing B . range line C . track line D . estimated positio

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• A pie chart is a circle divided into sections to show the relative proportions of a set of things. ( )

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• 89. The revision date of a chart is printed on which area of the chart ________.

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• 113. Distance along a track line is measured on a Mercator chart by using the ________.

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• 200. The survey information upon which a chart is based is found ____.

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• 188. What area of the earth cannot be shown on a standard Mercator chart?

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• 160. Which aid is NOT marked on a chart with a magenta circle?

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• 22. When a feature is to be removed from the chart, ______command is used.

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• 94. On a Mercator chart, 1 nautical mile is equal to ______.

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• 131. How is variation indicated on a small-scale nautical chart?

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• 145. A chart has extensive corrections to be made to is. After having been corrected, the chart is printed again and the chart issue is a ___

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• 91. When a feature remains in its existingcharted position but has a change ofcharacteristic,_____ command is usedon a chart.

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