shearing effect. It can exist in a horizontal or vertical direction and occasionally in both. 

WIND SHEAR ESCAPE- An unplanned abortive maneuver initiated by the pilot in command (PIC) as a result of onboard cockpit systems. Wind shear escapes are characterized by maximum thrust climbs in the low altitude terminal environment until wind shear conditions are no longer detected. 

## WING TIP VORTICES- 

(See VORTICES.) 

## WORDS TWICE- 

a. As a request: “Communication is difficult. Please say every phrase twice.” 

b. As information: “Since communications are difficult, every phrase in this message will be spoken twice.” 

## WS- 

(See SIGMET.) 

(See WEATHER ADVISORY.) 

## WST- 

(See CONVECTIVE SIGMET.) 

(See WEATHER ADVISORY.) 

