Pilot/Controller Glossary 

10/5/23 

c. 

Severe

−

 Causes large, abrupt changes in altitude and or attitude. It usually causes large variations in 

indicated airspeed. Aircraft may be momentarily out of control. 

d. 

Extreme

−

 The aircraft is violently tossed about and is practically impossible to control. It may cause 

structural damage. 

(See CHOP.) 
(Refer to AIM.) 

TURN ANTICIPATION

−

 (maneuver anticipation). 

TVOR

−

 

(See TERMINAL-VERY HIGH FREQUENCY OMNIDIRECTIONAL RANGE STATION.) 

TWO-WAY RADIO COMMUNICATIONS FAILURE

−

 

(See LOST COMMUNICATIONS.) 

PCG T

−

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