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Assume two arbitrary points A and B on the same parallel of latitude, but not on the equator. Point A is located on 010°E and point B on 020°E. The rumb line distance between A and B is always...

  • A

    More than 600 NM.

  • B

    Less than 600 NM.

  • C

    More than 300 NM.

  • D

    Less than 300 NM.

It is known that:

  • 1' change of latitude along any meridian equals to 1 NM
  • 1' change of longitude along the Equator equals to 1 NM

The change of longitude between two points A and B on the equator located on 010°E and on 020° E is 10°.

1° is equal to 60', thus the distance between the two points along the equator is 10° x 60' = 600 NM.

But, since the meridians converge inwards as latitude increases (either north or south), then the distance between the two points at the same parallel of latitude, othen than the Equator, will be less than 600 NM.

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