TM 1-1510-218-10 3-55 message,    RAIM    NOT    AVAILABLE,    APR    MODE INHIBITED, PREDICT RA IM ON STA 5. (1)   The approach must be discontinued.  The STA 5  page  provides  a  means  to  predict  when  RAIM will be available. (2)   To   perform   a   RAIM   prediction   on   the STA 5  page,  two  pieces  of  information  are  needed:   the location that the prediction will be for and the time for the prediction. (3)   The  destination  waypoint  will,  by  default, be the missed approach point of an approach loaded in  the  flight  plan.    If  there  is  no  approach  in  the  flight plan,  the  default  waypoint  is  the  last  waypoint  in  the active flight plan.  It is possible for the pilot to enter any desired waypoint in this field. (4)   The time used for the RAIM prediction will be  the  current  ETA  to  the  destination  airport  or  the MAP.  This time is automatically updated by the KLN 90B,  so  there  is  no  need  to  enter  a  value.    If  a  RAIM prediction   is   desired   for   planning   purposes,   it   is possible to enter a time in this field.  The time used for the   RAIM   prediction   is   always   in   the   future   and   is limited to 24 hours from the present time. (5)   To   perform   a   RAIM   prediction,  perform the following steps. 1.   Use  the  left  outer  and  inner  knobs  to select the STA 5 page. 2.   Press   the   left    CRSR   button.      The cursor will be over the DEST field. 3.   If necessary, enter the desired waypoint   identifier   by   using   the   left inner and outer knobs. 4.   Once the desired waypoint identifier is entered, press the  ENT button.  Press the ENT button again if the information is correct. 5.   The  cursor  will  now  be  over  the  ETA field.    If  necessary,  use  the  left  inner and  outer  knobs  to  enter  the  desired time    and    time    z one.        When    the desired time is entered, press the ENT button.      The   RAIM   calculations   will start.  The calculation will usually take a few seconds. 6.   Once the RAIM calculation is complete, the STA 5 page will indicate the results of the test.  Refer to Figure 3-72.  This is done graphically in a bar graph.    The  center  of  the  bar  graph represents     the     ETA.          Each     bar represents   5   minutes   of   time.      The RAIM calculation is good for ± 15 minutes  of  the  ETA.    Bars  that are  above  the  line  indicate  RAIM  is available    and    bars    below    the    line indicate when RAIM is not available. Even  more  rare  will  be  the  case  when  the  KLN 90B  cannot  provide  sufficient  integrity  monitoring  or  if there is an actual satellite failure while the aircraft is on the leg from the FAF to the MAP.   In these cases, the KLN 90B will flag the navigation solution and a missed approach  will  have  to  be  flown.    The  KLN  90B  will provide   the   following   message,   PRESS   GPS   APR FOR NAV. 7.   Press  the  external  GPS  APR button.   This    will    change    the    unit    to    the approach   arm   mode   and   navigation information will be restored. STA 5 RAIM STATUS DEST: 3K1 ETA:  14:35         UTC -15  0  +15 Figure 3-72.  RAIM Status ax.  SID/STAR Procedures.  The database contains   the   pilot   NAV   SID's   and   STAR's   for   the primary database coverage area. SID/STAR procedures    stored    in    the    database    can    only    be considered    accurate    as    long    as    the    database    is current. Even though the database contains SID/STAR procedures, there is a lot of information that is not included in the database.  Therefore, the paper chart  is  still  the  primary  source  of  information.    Many procedures   require   the   aircraft   to   fly   at   a   certain altitude,  along  a  heading  until  intercepting  a  course, and  many  other  procedures  that  the  KLN  90B  cannot automatically  accomplish.    Many  procedures  require pilot action to ensure that the proper path is flown over the ground.  The main purpose of loading a SID or a STAR  into  the  active  flight  plan  is  to  provide  a  quick way of loading a potentially large number of waypoints.