TM 1-1510-225-10 3D-11 the first four types.  Up to 250 user-defined waypoints may  be  created  and  defi ned as any of the five types.   There are three methods to select a specific waypoint for   viewing:   enter   the   waypoint’s   identifier   directly, scan  through  the  waypoint  identifiers  in  alphabetical order, or enter the waypoint’s name.  If the waypoint is an airport, it may also be selected by entering the city where the airport is located.   a.   Selecting   Waypoints   By   Identifier.      The most  direct  way  of  selecting  a  specific  waypoint  is  to enter the identifier directly on the appropriate waypoint page. 1.   Rotate  the  right  outer  knob  to  select  the appropriate  waypoint  type  page.    For  the airport   type   waypoints,   rotate   the   right inner knob to select the APT 1 page if it is not  already  in  view.    The  airport  identifier can be entered on any of the eight airport pages  but  the  APT  1  page  displays  the airport name. 2.   Press  the  right  CRSR  button  to  bring  the cursor     on     the     screen     over     the     first character of the identifier.  Check the right inner knob in the in position. 3.   Turn the right inner knob to select the first character  of  the   identifier.    Airports  that have  four  letter  identifiers  require  all  four letters.  Turn the knob either clockwise or counterclockwise. The letters and numbers     wrap     around     with     a     blank character   separating   the   9   and   the   A.   Turn  the  knob  clockwise  to  scan   through the   characters   in   alphabetical   order,   or counterclockwise to scan in reverse alphabetical order. Numbers are considered lower than letters.   4.   Rotate    the    right    outer    knob    one    step clockwise  to  position  the  cursor  over  the second character of the identifier. 5.   Use   the   right   inner   knob   to   select   the second character of the identifier. 6.   Use the right outer and right inner knobs in the  same  manner  as  above  to  select  the remainder of the identifier. 7.   Press  the  right   CRSR  button  to  remove the cursor from the  right page. 8.   If  the  waypoint  is  an  airport,  the  APT  2 through  APT  8  pages  may  be  viewed  by rotating  the  right  inner  knob.    Many  times not   all   of   the   characters   of   a   waypoint identifier need to be entered.  Every time a character is entered, the KLN 90B searches   its   database   to   offer   the   first waypoint in the database that begins with the characters that have been entered so far. b.  Selecting Waypoints By Scanning. 1.   Select  the  desired  waypoint  type  on  the right side by using the right outer knob. 2.   Pull    the    right    i nner    knob    to    the    out position. 3.   Turn   the   right   inner   knob   clockwise   to scan through the waypoints in alphabetical order,   or   counter-clockwise   to   scan   in reverse  alphabetical  order.    Numbers  are considered lower than letters.  The faster the   knob   is   turned   the   larger   the   step through  the  waypoints.    This  variable  rate scanning  allows  quick  movement  through the list.  When the knob is turned slowly, the waypoints are scanned one at a time. A list if the nine waypoints nearest to the present location  is  located  at  the  beginning  of  the  complete lists for airports, VOR's, and NDB's.  It is necessary to scan    backwards,    turn    the    knob    counterclockwise, through the complete list to reach the nearest list.  The top   right   portion   of   the   page   will   flash   the   relative position of the waypoint to the present position.  Refer to Figure 3D-7.  NR 1 indicates the nearest while NR 9 indicates the ninth nearest.  Waypoint pages displayed in   the   nearest   list   do   not   contain   a   latitude   and   a longitude   position   as   they   do   in   the   complete  list.   Instead, the bearing and distance to the waypoint are displayed.    In  addition,  nearest  airport  pages  display the length, surface, and lighting of the longest runway.   Once the nearest airport is displayed, the other airport pages   for   the   airport   are   available   for   display   by making  sure  the  right  inner  knob  is  pressed  in  and then turning it to select the desired airport page.