TM 1-1510-225-10 3D-70 NOTE The   waypoint   that   is   used   to   create   the reference waypoint may be in the published or user database.  This waypoint must  be  located  relative  to  the  flight  plan such that it is possible to draw a perpendicular  line  from  this  waypoint  to  a segment of the flight plan. ² ² ² ² KDAL BUJ TXKA KLIT TXK 330^o 32.9NM N Figure 3D-103.  Pilot Designated Point 1.   Select the reference waypoint page (REF) on the right side.  Refer to Figure 3D-104.   If a flight plan page is not displayed on the left side, the REF page displays, DISPLAY DESIRED – FPL ON – LEFT PAGE. FPL 2 USE? INVRT?   1:KDAL   2:BUJ   3:KLIT   4: REF E N R  -  L E G ENTER REF WPT: Figure 3D-104.  Reference Waypoint 2.   Display  the  desired  flight  plan  on  the  left side.    The  reference  feature  may be used on the active flight plan or on any of the 25 numbered flight plans that contain at least two waypoints. 3.   Press the right CRSR button to turn on the right cursor function. 4.   Use   the   right   inner   and   outer   knobs   to enter the identifier of the desired waypoint.   Refer to Figure 3D-105. CRSR E N T USE? INVRT?   1:KDAL   2:BUJ   3:KLIT   4: FPL 2 ENTER REF WPT:  TXK E N R   -   L E G Figure 3D-105.  Desired Waypoint 5.   Press    the    ENT    button    to    display    the waypoint     page     for     the     waypoint     just entered. 6.   Press the  ENT button again to display the waypoint    page    for    the    newly    created reference   waypoint.      The   waypoint   that was used to create the reference waypoint is automatically inserted into the REF field.   The   radial   and   distance   as   well   as   the latitude  and  longitude  are  also  displayed.   The  left  side  of  the  screen  shows  where the  reference  waypoint  will  be  inserted  in the flight plan. The KLN 90B automatically names the reference waypoint  by  appending  the  first  available  alphabetic character   to   the   identifier   of   the   waypoint   used   to define  the  reference  waypoint.    TXK  becomes TXKA, etc.    Refer  to  Figure  3D-106.    If  TXK  is  used again to create  a  second  reference  waypoint  in  another  flight plan, this second reference waypoint would be named TXKB.      If   a   reference   waypoint   is   created   using   a waypoint    with    a    five-character    identifier,    the    fifth character   will   be   dropped,   e.   g.,   DUSTT  becomes DUSTA. SUP E N T USE? INVRT?   1:KDAL   2:BUJ   3:TXKA   4:KLIT   5: CRSR E N R   -   L E G TXKA REF:  TXK RAD: 330.3^o DIS: 32.8NM N 34^o 01.08’ W 94^o 19.67’ Figure 3D-106.  Reference Waypoint Name