TM 1-1510-218-10 3-37 displayed    on    the    page    at    one    time.        To    view intermediate waypoints, turn the left cursor function on and use the left outer knob to manually scroll through all the waypoints.  If scrolling is performed all the way to the end of the flight plan, a blank waypoint position will exist so that a waypoint may be added to the end of the flight plan. ah.  Turn  Anticipation  And  Waypoint  Alerting.   Prior  to  reaching  a  waypoint  in  the  active  flight  plan, the  KLN  90B  will  provide  navigation  along  a  curved path  segment  to  ensure  a  smooth  transition  between two  adjacent  legs  in  the  flight  plan.    Refer  to  Figure 3-43.    This  feature  is  called  turn  anticipation.    The transition  course  is  based  upon  the  aircraft's  actual groundspeed and the amount of course angle change between  the  two  legs.    The  KLN  90B  automatically sequences to the next leg after passing the midpoint in the transition segment. ² ² ² W P T    1 W P T   2 W P T   3 Figure 3-43.  Turn Anticipation Approximately 20 seconds prior to the beginning of   turn   anticipation,   the   arrow   preceding   the   active waypoint  identifier  will  begin  flashing  on  the  FPL  0 page   and   on   any   Navigation   page,   Distance/Time page, or Waypoint page displaying the active waypoint identifier.      On   the   Super   NAV   5   page,   the   entire waypoint   identifier   will   start   to   flash.      The   external waypoint  alert  annunciator  will  begin  flashing  at  the same time.  This is called waypoint alerting. To  utilize  the  turn  anticipation  feature,  start  the turn transitioning to the next leg in the flight plan at the very beginning of turn anticipation.  This occurs when the  external  waypoint  alert  annunciator  or  the  active waypoint  identifier  on  the  Super  NAV  5  page  stops flashing  and  goes  on  steady.    At  this  time,  the  KLN 90B will generate a message on the message page for the  new  desired  track  to  select  on  the  HSI:  ADJ  NAV IND CRS  TO 123^o.  A message will not be given if the change in desired track is less than 5° or the KLN 90B is  interfaced  with  an  HSI  having  a  course  pointer  that is automatically slewed to the correct desired track. The desired track displayed on the NAV 3 page also   changes   to   the   value   of   the   next   leg   at   the beginning    of    turn    anticipation.        Turn    anticipation becomes  inactive  when  transition  to  the  next  leg  has been made. The KLN 90B can read the selected course set on the external HSI.  The KLN 90B will flash the value of the desired track on both the NAV 3 and the Super NAV 5 pages when the desired track and the selected course   differ   by   more   than   10°.      Set   the   selected course  to  match  the  desired  track.    This  will  ensure that the orientation is always pictorially correct. If  desired,  turn  anticipation  may  be  disabled,  or enabled, on the SET 6 page. ai.    Viewing    The    Waypoint    Pages    For    The Active Flight Plan Waypoints.     The  waypoint  pages for  each  of  the  waypoints  in  the  active  flight  plan  may be  displayed  by  selecting    the  Active  Waypoint  page with the right outer knob.  Refer to Figure 3-44.  When the ACT page is first selected, the waypoint page for the  active  waypoint  will  be  displayed.    The  sequence number of the waypoint in the flight plan is annunciated  with  a  number to the left of the identifier.   An arrow to the left of the waypoint number designates the  active  waypoint.    The  letter  to  the  far  right  of  the identifier designates the type of waypoint:  A – airport, V – VOR, N  – NDB, I  – intersection, S – supplemental, or T  – terminal.  For VOR's having DME capability, the letter  D  is  displayed  between  the  VOR  identifier  and the V. ACT   2 GPT D V GULFPORT       L 109.00  2^o E N 30^o 24.40’ W 89^o 04.60’ E N R   -   L E G   1:KNEW   2:GPT   3:SJI   4:CEW   5:MAI   8:KPIE FPL 0 Figure 3-44.  The Active Waypoint Page To  view  the  other  waypoints  in  the  flight  plan, pull the right inner knob to the “out” position and turn it to  view each of the waypoints in the order they are in the  active  flight  plan.    For  airport  waypoints,  the  right inner  knob  may  be  pushed  back  to  the  “in”  position and  rotated  to  display  any  of  the  eight  airport  pages.