NSC (No Significant Cloud) [MET]

[Ref SKYbrary, Jeppesen]

What’s NSC?

NSC (No Significant Cloud) is used when there are no “clouds of operational significance” to report – no CB or TCU, but CAVOK is not appropriate (either ceiling, visibility or any significant weather not meeting CAVOK requirement).

 

Note:

CLOUD OF OPERATIONAL SIGNIFICANCE —

  1. A cloud with the height of cloud base:
           a)  below 1500m (< 5000ft); OR

           b) below the highest minimum sector altitude
    a) or b) – whichever is greater,OR
  2. a cumulonimbus cloud (CB) at any height; OR
  3. a towering cumulus cloud (TCU) at any height

 

 

 

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