TM 1-1510-225-10 3D-28 5.     Press the   ENT  button  to  display  the waypoint  page  for  the  identifier  just entered. 6.     Press     the     ENT     button     again     to approve    the    waypoint    page.        The intersection page is displayed with the computed radial and distance. 7.     Press  the  right  CRSR  button  to  turn off the right cursor function. 3D-16.  SUPPLEMENTAL WAYPOINT PAGE. a.   Supplemental     Waypoint     Page     Display.   Supplemental   waypoints   are   user-defined  waypoints that  have  not  been  defined  specifically  as  an  airport, VOR,  NDB,  or  Intersection.    Supplemental  waypoints also  include  ARTCC  center  waypoints  and  reference waypoints  discussed  later.    The  following  information is displayed on the supplemental waypoint page. 1.   The name of identifier of the supplemental waypoint. 2.   The position of the supplemental waypoint expressed    in    terms    of    a    radial    and distance from a nearby VOR. 3.   The latitude and longitude of the supplemental waypoint. The identifier of another nearby waypoint may be entered  in  the  REF  field  and  the  page  will  compute and  display  the  radial  and  distance  from  the  nearby waypoint  to  the  supplemental  waypoint.    This  radial and   distance   is   not   stored   with   the   supplemental waypoint page and is lost when leaving the page. 3D-17.  USER-DEFINED WAYPOINTS. Up    to    250    user-defined    waypoints    may    be created.    These  waypoints  may  be  defined  as  a  user- defined   airport,   VOR,   NDB,   or   intersection.      If   the waypoint doesn’t fit into one of these categories, it may be defined as a supplemental waypoint. a.   Creating a User-Defined Airport Waypoint. A    user-defined    airport    waypoint    must    contain    an identifier,   latitude,   and   longitude.      In   addition,   any combination  of  airport  elevation,  one  runway  length, and associated runway surface, and remarks can also be   stored.      Communication   frequencies   cannot   be stored on the APT 4 page, airport services cannot be stored  on  the  APT  6  page,  SID's  and  STAR's  cannot be    stored    on    the    APT    7    page,    and    approach procedures cannot be stored on the APT 8 page. 1.   Use   the   right   outer   knob   to   select   the airport waypoint pages. 2.   Rotate  the  right  inner  knob  to  select  the APT 1 page. 3.   Press the right CRSR button to turn on the right    cursor    function.        The    cursor    will appear   over   the   first   character   of   the identifier. 4.   Use   the   right   inner   and   outer   knobs   to select  the  identifier  of  the  user  waypoint.   The identifier can be up to four characters in length.  Refer to Figure 3D-28. 5.   To    create    a    waypoint    at    the    present position, turn the right outer knob clockwise    to    position    the    cursor    over PRES  POS?  and  press  the    ENT button.   The  APT  1  page  will  now  be  displayed with    the    latitude    and    longitude    of    the waypoint at the bottom of the page. FARM CREATE NEW WPT AT: USER POS? PRES POS? CRSR Figure 3D-28.  User-Defined Waypoint Page 6.   To    create    a    waypoint    at    a    specified position,    place    the    cursor    over    USER POS? and press the  ENT button.  A page with the identifier at the top and dashes at the bottom will now be displayed.  Refer to Figure 3D-29.