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Given the following information, what are the distances from A to B and from A to C respectively?

Position ‘A’ N60, W020
Position ‘B’ N60, W021
Position ‘C’ N59, W020

  • A
    52 NM and 60 NM
  • B
    60 NM and 30 NM
  • C
    30 NM and 60 NM
  • D
    60 NM and 52 NM

Refer to figure.
To find the distance from A to B;
D Long = 1 ° x 60 = 60 '
Departure = D Long x cos Lat
Departure = 60 'x cos 60 = 60' x 0.5 = 30 NM

To find the distance from A to C; The distance between points A and C in the same meridian and hemisphere is subtracted from the angle of point A and the angle of point B, the angle between the two points;
60 ° N - 59 ° N = 1 °,
and this 1 degree arc segment between latitudes is 60 NM.

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