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2 Answers

Cloud cover units

Asked by: 4387 views , ,
General Aviation

The 'okta' is the cloud cover units. This one goes from 0 to 8 (actually 9 if I'm right, as 9 is for 'sky obstructed from view'). Can someone explain to me why such a unit? Why not going from 1 to 10 for example. They must be a scientific reason behind this magic '8' number. 

Thanks

 

 

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2 Answers



  1. Kris Kortokrax on May 15, 2014

    It is probably a binary progression.

    Divide the entire sky (360 degrees) by 2.
    Divide each half by 2 = 4
    Divide each quarter by 2 = 8 (octa or okta).

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  2. Bidochon on May 15, 2014

    Make sense. Thanks Kris.

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