TM 1-1510-225-10 3D-34 2.   Press the left  CRSR button to turn on the left  cursor  function.    The  cursor  will  come on over the first blank waypoint position. 3.   Rotate    the    left    outer    knob    one    step counterclockwise   to   position   the   cursor over LOAD FPL 0.  Refer to Figure 3D-41. 4.   Press the   ENT  button  to  load  the  active flight plan into this numbered flight plan. LOAD FPL 0?   1: CRSR Figure 3D-41.  Storing 0 As a Numbered Flight Plan g.  Operating   From   the   Active   Flight   Plan. The  following  rules  and  considerations  apply  for  flight plan operation while the KLN 90B is in the LEG mode: (1)   Although    any    of    the    pages    may    be utilized  while  operating  along  a  flight  plan,  common selections  are  the  FPL  0  page  on  the  left   side while simultaneously displaying one of the three Distance/Time  pages  or  the  NAV  5  page  on  the  right side.  The Super NAV 5 page is especially useful for flight plan operation.  It provides a visual orientation of the aircraft position in the active flight plan.  The other four NAV pages may also be used extensively. (2)   Always  verify  that  the  FPL  0  page  is  in view. (3)   The    active    leg    of    the    flight    plan    is designated with a       symbol.  Refer to Figure 3D-42.   A leg is defined as the course line between a   pair of points.  The head of the arrow is positioned to the left of and points to the active  TO waypoint.  The tail of the symbol points to the  FROM  waypoint.    The  symbol  is not displayed unless the KLN 90B is receiving signals suitable  for  navigation  or  if  DIRECT  TO  navigation  is occurring.  The top of the NAV 1 page will also indicate if point to point navigation or  DIRECT TO  navigation is occurring.    To  cancel  the   DIRECT  TO  operation  and operate     from     the     active     flight     plan,     press     the   D  button, the clear button, and the ENT button.   1:KNEW   2:GPT   3:SJI   4:CEW   5:MAI   8:KPIE FPL 0 Figure 3D-42.  Storing a Flight Plan (4)   As the flight plan waypoints are reached, the active leg symbol automatically orients itself on the next leg. (5)   If the flight plan contains more waypoints than  can  be  displayed  on  the  screen  at  one  time, the page   will   automatically   scroll   as   progress   is   made along  the  flight  plan  so  that  the  active  leg  is  always displayed. (6)   The   last   waypoint   in   the   flight   plan   is always  displayed  at  the  bottom  of  the  FPL  0  page, even  if  all  of  the  waypoints  in  the  flight   plan  can’t  be displayed    on    the    page    at    one    time.        To    view intermediate waypoints, turn the left cursor function on and use the left outer knob 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. h.  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 3D-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. (1)   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.