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What is the longitude of a position 6 NM due east of 58°42’N, 094°00’W?
  • A
    093°54.0’W
  • B
    093°48.5’W
  • C
    093°53.1’W
  • D
    094°12.0’W

Distance between two meridians of longitude (along a parallel)

Meridians converge from the Equator to the Pole.
A change in longitude (degrees) will not represent the same East-West distance (nm) for different latitudes.

Departure = change in longitude (°) x 60 x cosine (latitude)

Change in longitude (°) = 6 / (60 x cosine (58º42’)) = 0º11’33’’

094º00’ - 0º11’33’’ = 93º48,5’

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