TM 1-1510-218-10 3C-92 Table 3C-30.  Attribute Designators   ATTRIBUTE DESCRIPTION C A course reversal is enabled at this waypoint. D A  DME  Arc  will  be  flown  to  this  waypoint.    DME  Arcs  only  exist  in  published  GPS approaches. F The  waypoint  is  designated  as  the  Final  Approach  Fix  (FAF)  for  database  and  tactical approaches. H A  holding  pattern  has  been  attached  to  this  waypoint.    If  the  waypoint  is  an  IAF  or missed approach holding point with a data base holding pattern attached, this attribute is displayed on the holding Flight Plan page when the holding pattern is enabled. I The waypoint is a valid intercept solution for a moving target. M The waypoint is designated as the Missed Approach Point (MAP). P This waypoint is a fix for a pattern that will be executed upon arrival at the point. R This waypoint is part of a STAR. S This waypoint is part of a SID. T The waypoint has a desired time of arrival associated with it.  This indicates that a Time Navigation  (TNAV)  function  will  be  performed  to  obtain  the  Required  Time  of  Arrival (RTA) on the Flight Plan Waypoint page. V The   waypoint   has   an   altitude   specified   that   will   cause    vertical   navigation   to   be performed. Table 3C-31.  Attribute Hierarchy ATTRIBUTES M T V H D C F P I R S NOTE The     right-most     column     of     attributes shown in this table is deleted first when used   in   combination   with   other   listed attributes.  (4)   Automatic Leg Advance. When waypoints   beyond   the   active   waypoint   are   in   the flight   plan   and   the   flight   plan   advance   mode   is automatic (AUTO or FLYOVER mode), the FMS-800 computes great circle tracks between those waypoints.  It also automatically transitions smoothly from one waypoint to the next. To sequence past a waypoint, the aircraft track angle  must  be  within  90°  of  the  active  leg  course and the Track Angle Error (TKE) must be within 90°.   Otherwise, sequencing will be inhibited and guidance will continue    to    reference    the    inbound    course    to    the waypoint. To prevent overshoot of the next leg, automatic leg switching in AUTO mode includes turn anticipation, up to 30 nm prior to the waypoint, for course changes   150°.   Over 150°, the waypoint will be overflown and a teardrop turn  is  made  to  intercept  the  next  leg.    Refer  to  Figure 3C-38. NOTE When   the   change   in   the   resulting   course between flight plan legs is greater than 150°, the  FMS  will  provide  guidance  to  turn  and intercept  the  next  course,  resulting   in  an  S- turn  maneuver  into  the  course.    The  course to  the  next  waypoint  is  based  on  geometry between    waypoints,    not    waypoint    course guidance, for smooth turns.  When  the  pilot  has  selected  the  FLYOVER  mode, leg  switching  is  also  automatic,  but  each  waypoint  is overflown prior to turning to intercept the next leg. Prior to the leg switch point, the waypoint alert light illuminates  and  the  waypoint  number  on  the  Flight  Plan page and the  ¯  to ¯  indicator on the Lateral Steer page will flash for 10 seconds.