CLEAR-AIR TURBULENCE- Turbulence encountered in air where no clouds are present. This term is commonly applied to high-level turbulence associated with wind shear. CAT is often encountered in the vicinity of the jet stream.
(See WIND SHEAR.) ...
CAT - Clear-Air Turbulence.
CATHEDRAL SEE ANHEDRAL
CAVU - Ceiling and Visibility Unlimited; ideal flying weather.
One type of hazard is clear-air turbulence. Typically found in a jet stream's vicinity, clear-air turbulence forms around the boarders of jet streams or in the areas at or between the convergence of two jet streams.
Life has a way of throwing clear-air turbulence at us when least expected. Petrus got his A&P ticket, but a slumping aerospace industry sent him back to his native upstate New York in 1964. Once there, 'I went looking to go flying again.' ...
 See also: Visibility, Takeoff, Attitude, Aeronaut, Air traffic
  
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