TM 1-1510-225-10 3D-45 Table 3D-15.  Approach Waypoint Naming Conventions DISPLAY EXPLANATION Cxyyy C stands for course fix Daaab D  stands  for  DME  arc  waypoint.    Aaa is  the  radial  that  the  fix  is  on  from  the reference   VOR.      B   will   be   a   letter corresponding to the distance from the reference VOR.  For example, G is the seventh    letter    of    the    alphabet    so D234G  would  be  a  point  on  the  234° radial  7  nm  from  the  reference  VOR.   DME arcs greater than 26 nm will have waypoints where the first two characters  are  the  first  two  letters  of the   DME   identifier.      The   next   three characters  will  be  the  radial  that  the arc waypoint is on. Fxyyy F stands for final approach fix Ixyyy I stands for intermediate approach fix Mxyyy M stands for missed approach fix RWzzz RW   stands   for   runway   fix.      This   is usually the MAP for the approach.  Zzz will    be    a    runway    number,    possibly including  L  for  left,  R  for   right,  C  for center, or B for both. (3)   Some waypoints have a dash and a small letter  at  the  end  of  the  waypoint  name.    The  small letter is an aid to help recognize important points in an approach.  These suffixes are displayed on the FPL 0 page,  the  Super  NAV  5  page,  and  the  Super  NAV  1 page.  The suffixes are shown in Table 3D-16. Table 3D-16.  Approach Waypoint Suffixes SUFFIX EXPLANATION f final approach fix i initial approach fix m missed approach point n missed approach holding point (4)   Every  approach  will  have  an  FAF  and  a MAP.      Almost   all   will   have   an   IAF   and   a   missed approach holding point. (5)   Another  item  in  the  flight  plan  is  the  line *NO WPT SEQ.  This is what is referred to as a fence and is an alert that the KLN 90B will not automatically sequence  past  the waypoint that precedes the fence.   The  waypoint  before  the  fence  is  always  the  missed approach point.  The reason that waypoint sequencing is     not     allowed     is     that     many     missed     approach procedures require specific action before going to the missed   approach   holding   point   e.g.,   climbing   on   a fixed heading until reaching an altitude. e.   Changing  or  Deleting  an  Approach  Once Loaded   Into   the   Flight   Plan.      The   sequence   of waypoints retrieved from the database of the KLN 90B define  the  approach  procedures  as  they  are   charted.   To  ensure  that  the  proper  path  over  the  ground  is followed,   it   is   not   possible   to   either   delete   or   add waypoints  to  the  approach  section  of  the  flight  plan.   To  help  see  which  waypoints  are  en  route  waypoints and which are approach waypoints, the KLN 90B does not display a colon next to the waypoint number on the FPL 0 page if the waypoint is an approach waypoint. (1)   It is only possible to replace the existing approach    with    another    one    or    delete    the    entire approach from the flight plan. 1.     With    the    left    page    displaying    the active  flight  plan  (FPL  0),  turn  the  left cursor on.  Refer to Figure 3D-62.   8:LAS   9:DAG V25L-KLAX 10 ELMOO-i 11 LAX18 17:KLAX CRSR ENR - LEG Figure 3D-62.  FPL 0 with Approach 2.     Move the cursor so that it covers the approach   header   at   the   top   of   the approach procedure.  Refer to Figure 3D-63.    Once  the  cursor  comes over the approach header, it will change to read   CHANGE   APR?.      If   the   ENT button is pressed, the APT 8 page will automatically   come   up   on   the   right side.      Now   it   is   possible   to   select different approach procedures, different LAS's, or both.