TM 1-1520-218-10 3C-155 Figure 3C-101.  Direct Intercept Insertion Table 3C-71.  Direct Intercept Insertion Procedure NO. DESCRIPTION/FUNCTION 1 When   the   intercept   has   been   defined, pressing  FPLN  INSR  line  select  key  will access the flight plan. 2 Inserts the   intercept  before  this  point  in the   flight   plan   (in   this   case,   a   direct intercept is being performed). 3 An I  indicates  that  an  intercept  has  been attached to this waypoint. 4 Intercept  position  is  displayed  as  a  LAT– LONG and is updated every 22 seconds. (b)   Planned     Intercepts.          When    the intercept is inserted as a future waypoint, the intercept location  is  regularly  updated  based  on  the  following information. 1.   Location of the flight plan waypoint immediately prior to the intercept. 2.   Distance along the flight  plan  from aircraft   position   to   the   waypoint prior to the intercept. 3.   Current own aircraft speed. 4.   Moving target definition. 5.   Current wind. The   estimated   time   of   arrival   at   the   waypoint immediately  prior  to  the  intercept  is  computed.    The intercept  point  and   its  ETA  are  computed  from  that point  in  exactly  the  same  manner  as  the  direct  case.   The    intercept    is    executed    exactly    as    the    direct intercept     when     it     becomes     active.          Refer     to Figures 3C-102 and 3C-103. (2)   Intercept Passage.  When an intercept is passed    into    history,    the    latitude–longitude    of    the intercept at the time of waypoint passage is recorded as the flight plan history waypoint and the I is removed from the waypoint. (3)   Multiple Intercepts.  Ten moving waypoint (intercept) definitions may be inserted in the flight plan.   Each intercept solution is computed independently and flown in the flight plan sequence. (4)   A calculator function is provided to allow the crew to enter an alternate TAS and see the effect on  the  intercept.    This  calculator  is  available  for  an intercept  not  inserted  into  the  flight  plan  and  for  the next intercept in the flight plan. Refer to Figure 3C-104 and Table 3C-72. p.  Markpoint and Waypoint List Storage. (1)   Markpoint   and   Waypoint   List   Overview.   The  FMS–800  maintains  a  markpoint  list  of  up  to 10 markpoints   and   a   user   waypoint   list   of   up   to   200 waypoints.  The lists are stored in nonvolatile memory.   Each   list   is   maintained   on   separate   pages   and   is accessed  from  the  Flight  Plan  Edit  page.    Refer  to Figure   3C–105   and   Table   3C-73.      To   access   the Markpoint  List  page,  press  the   MARKPT  line  select key   on   the   Flight   Plan   Edit   page.      To   access   the Waypoint List page, press the  USER WYPT line select key.