TM 1-1510-225-10 3D-71 7.   Press    the    ENT    button    once    again    to approve the waypoint page for the reference  waypoint  and  insert  it  into  the flight plan. 8.   Press the right CRSR button to turn off the right cursor function. A reference waypoint is stored as a supplemental waypoint and counts as one of the 250 possible user-defined waypoints. Reference waypoints that are part of a flight plan show up on the listing of user-defined waypoints displayed on the OTH 3  page.    However,  reference  waypoints  that  are  no longer  part  of  a  flight  plan  are  deleted  from  the  list  of user-defined  waypoints  when  the  KLN  90B  is  turned off. b.  Center Waypoints.  Like reference waypoints,  creating  center  waypoints  is  a  method  of adding  waypoints  to  a  flight  plan.    Center waypoints are    waypoints    at    locations    where    a    flight    plan intersects    the    Center    or    FIR    boundary.        Placing waypoints  on  the  boundaries  results  in  the  minimum number  of  waypoints  required  to  meet  the  criteria  of having  one  waypoint  in  each  Center’s  airspace.  The Center boundaries are stored in the database. (1)   Creating Center Waypoints. 1.     Select  the  Center  Waypoint  1  (CTR 1)  page  on  the  right  side.    If  a  flight plan  page  is  not  being  displayed  on the   left   side,   the   CTR   1   page   will display,   DISPLAY   DESIRED   –   FPL ON – LEFT PAGE. 2.     Select the desired flight plan page on the left side.  It may be the active flight plan or one of the other 25 numbered flight plans. 3.     Press the  ENT button to compute the Center   waypoints.      Refer   to   Figure 3D-107.    A  Center  waypoint  will    be created   at   each   intersection   of   the flight   plan   with   a   center   boundary.   When   computation   is   complete,   the CTR   1   page   will   display   how   many Center waypoints have been computed.  Refer to Figure 3D-108. USE? INVRT?   1:KLBB   2:KMCK   3: FPL 3 CTR 1 ENT ENR  -  LEG PRESS ENT TO COMPUTE CTR WPTS Figure 3D-107.  CTR 1 Page  – Computing Waypoints CTR 1 3 NEW WPTS PRESS ENT TO INSERT INTO FPL ENT Figure 3D-108.  CTR 1 Page  -  Center Waypoints 4.     To  view  the  Center  waypoints  before inserting them into the flight plan, turn the   right   inner   knob   to   the   CTR   2 page.  Multiple Center 2 pages will be annunciated as CTR+2. (a)   The top line contains the identifier of the   Center   waypoint.      The   KLN   90B   automatically creates  the  identifier  by  appending  the  first  available two-digit number to the identifier of the nearest VOR to the  waypoint.    Therefore,  if  Plainview  (PVW)  is  the nearest VOR to the first Center waypoint location, the 00  is  appended  to  PVW  to  create  PVW00.    If  PVW were   later   used   in   the   creation   of   another   Center waypoint,  the  second  waypoint’s  identifier  would  be PVW01. (b)   The  second  line  of  the  CTR  2  page shows  the  from  Center  followed  by  the  to  Center.    In this  example,  PVW00  lies  on  the  boundary  between Ft. Worth (FW) and Albuquerque (ABQ) Centers. (c)   The  third  and  fourth  lines  of  the  CTR 2 page display the Center waypoint location in terms of the    identifier    of    the    nearest    VOR    to    the    Center waypoint and the distance and radial from this VOR to the  Center  waypoint.    Lines  five  and  six  display  the Center   waypoint   location   in   terms   of   latitude   and longitude.  Refer to Figure 3D-109.