TM 1-1510-218-10 3-47 Table 3-15.  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. In  the  rules  above,  x  and  yyy  are  defined  as follows:  for runways with only one approach, x will be replaced with an A or an F; and for runways that have multiple   approaches,   x   will   be   replaced   with   V   for VOR,  N  for  NDB,  or  R  for  RNAV.    The  letters  yyy  will be   replaced   with   either   the   runway   identifier   (e.g. FF25L) or, for circling approaches, the inbound course to the missed approach point (e.g. MA259). Waypoints  along  a  given  radial  will  be  named such   that   the   first   three   letters   are   the   reference VOR/DME and the next two are the DME distance.  If the   distance   is   greater   than   100   nm,   the   order   is reversed.    For  example,  LAX18  is  18  nm  from  LAX while 26FLW is 126 nm from FLW. 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 3-16. Table 3-16.  Approach Waypoint Suffixes SUFFIX EXPLANATION f final approach fix i initial approach fix m missed approach point h missed approach holding point Every  approach  will  have  an  FAF  and  a  MAP.   Almost  all  will  have  an  IAF  and  a  missed  approach holding point. 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. aq.  Changing  Or  Deleting  An  Approach  Once Loaded   Into   The   Flight   Plan.      The   sequence   of waypoints retrieved from the database of the KLN 90B defines 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. 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 3-62. 2.   Move   the   cursor   so   that   it   covers   the approach     header     at     the     top     of     the approach    procedure.        Refer    to    Figure 3-63.    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.