TM 1-1520-218-10 3C-211 Table 3C-111.  Aural Annunciator Messages MESSAGE INTERPRETATION Traffic Advisory Annunciation Traffic; Traffic Traffic    has    entered    20    to    48-second    envelope. Symbol has changed to solid yellow circle. Resolution Advisory Annunciations (Maneuver should begin within 5 seconds) Climb; Climb; Climb Climb at rate shown on vertical speed indicator. Climb-Crossing Climb; Climb-Crossing Climb Climb at rate shown on vertical speed indicator.  Flight path will cross intruder's flight path. Reduce Climb; Reduce Climb Reduce   rate    of   climb    to    that    on    vertical    speed indicator. Descend; Descend; Descend Descend at rate shown on vertical speed indicator. Descend,   Crossing   Descend;   Descend,   Crossing Descend Descend  at  rate  shown  on  vertical  speed  indicator. Flight path will cross through intruder's flight path. Reduce Descent; Reduce Descent Reduce   rate   of   descent   to   that   shown   on   vertical speed indicator. Monitor Vertical Speed; Monitor Vertical Speed Monitor   present   vertical   speed   to   prevent   entering restricted (red arc) vertical speed. Increased Action Resolution Advisory Annunciations (Maneuver should begin within 2 1/2 seconds) Increase Climb; Increase Climb Follows   "Climb"   advisory   due   to   intruding   aircraft's maneuvering.  Rate of climb of own aircraft should be increased. Increase Descent; Increase Descent Follows "Descend" advisory due to intruding aircraft's maneuvering.  Rate of descent of own aircraft should be increased. Climb-Climb Now; Climb, Climb Now Follows "Descend" advisory when reversal of vertical speed   is  required   due  to  maneuvering   of   intruding aircraft. Descend, Descend Now; Descent, Descend Now Follows   "Climb"   advisory   when   reversal   of   vertical speed is required due to maneuvering of the intruding aircraft. Threat Situation Resolved Clear of Conflict Intruding aircraft is no longer a threat. f.   Traffic   Display.      Four   types   of   symbols differentiated by shape  and  color  are  used  to  display intruders   around   your   own   aircraft.      The   different symbols represent Other Traffic, Proximate Traffic, TA, and RA. (1)  Off-Scale and No-Bearing Traffic.  When an intruder is  outside  the  indicator  display  range,  the symbol associated with it will be a partial one shown at the outside edge of the display at the relative bearing to  the  target.    As  the  aircraft  moves  into  the  display range,   the   symbol   will   become   a   full   symbol   as   it moves into the display area.  When the TCAS cannot compute bearing information on an RA or TA intruder, a  text  message  will  be  displayed.    For  example,  RA 1.4-10 IS A RESOLUTION ADVISORY DUE TO AN AIRCRAFT 1.4 MILES DISTANT, 1000 FEET BELOW YOUR  AIRCRAFT  AND  CLIMBING.    The  text  for  an RA will be red and a TA will be yellow. (2)  Other   Traffic.      A   cyan   or   white   open diamond    indicates    an    Other    Traffic    intruder.        It represents an aircraft greater than 6 nm away and/or greater   than   ±   1200   feet   altitude   relative   to   your aircraft. (3)  Proximate  Traffic.      A   Proximate   Traffic intruder is displayed as a cyan or white solid diamond. It  represents  an  aircraft  within  6  nm  and  ±  1200  feet relative  altitude.    These  aircraft  are  not  considered  a