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In a Lambert chart with standard parallels at 37°N and 65°N, concerning the straight line depicted on the map connecting points A (N49° W030°) and B (N48° W040°), which statement is accurate?

  • A

    Rhumb line is to the north, the great circle is to the south.

  • B

    Great circle and rhumb line are to the north.

  • C

    Great circle and rhumb line are to the south.

  • D
    Great circle is to the north, the rhumb line is to the south.

Refer to figure.
On a Lambert chart, the characteristics of Great Circles and Rhumb Lines are as follows:

For Great Circles:

  • Meridians are depicted as straight lines.
  • Near the parallel of origin, they appear nearly straight.
  • At any other latitude, Great Circle tracks take on a curved shape that is concave towards the parallel of origin.

For Rhumb Lines:

  • Meridians are shown as straight lines.
  • All other Rhumb Lines are concave toward the pole.
  • This curvature is particularly noticeable in parallels of latitude.

In the context of this Lambert chart, the standard parallels are 65ºN and 37ºN. The Parallel of Origin falls between these standard parallels, approximately at 51ºN. Consequently, when drawing a straight-line track from 49ºN 030ºW to 48ºN 040ºW, this track will be positioned south of the Parallel of Origin.

The Great Circle track between these points will exhibit concavity toward the Parallel of Origin, which means it will be positioned south of the straight-line track.

Similarly, the Rhumb Line Track will also show concavity towards the nearer pole and will lie on the equatorial side of the Great Circle Track. Therefore, it will be situated to the south of the Great Circle Track.

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