8/15/19  Pilot/Controller Glossary  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.  WORDS TWICE- WS- WST- 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.”  (See SIGMET.)  (See WEATHER ADVISORY.)  (See CONVECTIVE SIGMET.)  (See WEATHER ADVISORY.)  (See VORTICES.)  WING TIP VORTICES- PCG W-2 