TM 1-1510-225-10 3D-21 CAUTION The NAV 5 and Super  NAV 5 pages do not display weather, terrain, special use airspace, or other data. (11)It is possible to change the active waypoint to  any  of  the  flight  plan  waypoints  on  this  page.    Pull the right inner knob to the out position.  This will create a window at the bottom right corner of the display that will initially contain the identifier of the active waypoint.   Refer to Figure 3D-18.  The waypoint contained in this window will be the default waypoint when the direct to button is pressed.  By turning the right inner knob, it is possible  to  scan  through  the  waypoints  of  the  active flight   plan.      Turning   the   knob   clockwise   will   scan through the waypoints in sequence until the end of the flight plan is reached. Turning the knob counterclockwise   will   scan   through   the  active  flight plan  in  reverse  order  until  the  beginning  of  the  flight plan  is  reached.    Pushing  the  right  inner  knob  in  will remove the window from the display. 9.0 NM LRP ENR-LEG 200 KT ETE0:03 DTK113^o TK113^o 40 AB LRP . . APG LRP LOX BZJ RAV ETX Figure 3D-18.  Super NAV 5 Page (Active Waypoint Identifiers) (12)The  Super  NAV  5  page  can  be  configured to  display  the  VNAV  status.    This  means  the  VNAV status    and    advisory    altitude    for    VNAV    can    be displayed   on   the   Super   NAV   5   page.      The   VNAV problem still needs to be set up on the NAV 4 page. CAUTION Advisory    VNAV    operation    will    only    be accurate if the barometric altimeter setting is kept updated. (a)   Set  up  the  VNAV  situation  from  the NAV 4 page. (b)   Turn  to  the  Super  NAV  5  page  by selecting NAV 5 on both sides of the display. (c)   Turn on the left cursor and rotate the left  outer  knob  counter-clockwise  until  the  cursor  is over the third line from the bottom of the display. (d)   Rotate the left inner knob until VNAV is displayed.  Turn the left cursor off. (e)   The   Super   NAV   5   page   will   now display the VNAV status.  If the VNAV problem has not been defined yet, V OFF will be displayed.  If the time to start VNAV operation is greater than 10 minutes, V ARM is displayed.  When the time to VNAV operation is less than 10 minutes, the time until VNAV operation will start will be displayed, e. g., V 4:53.  If the VNAV operation   has   started,   a   suggested   altitude   will   be displayed, e. g., V 4300. CAUTION Failure   to   keep   the   barometric   altimeter setting   updated   will   result   in   inaccurate special use airspace alerting. The KLN 90B’s special use airspace alert is only  a  tool  to  assist  the  pilot   and  should never be relied upon as the sole means of avoiding these areas.  NOTE Special  use  airspace  alerting  is  disabled when   in   the   approach   arm   or   approach active modes.  3D-11.  SPECIAL USE AIRSPACE ALERT. The  KLN  90B  contains  the  location  of  areas  of special  use  airspace.    A  message  prompt  is  used  to alert   proximity   to   special   use   airspace.      When   the message  page  is  viewed,  it  will  display  AIRSPACE ALERT  and  the  name  and  type  of  the  special  use airspace.    If  the  special  use  airspace  is  a  Class  B, Class C, CTA,  or TMA, the message page will include instructions  to  see  the  APT  4  page  for  the  primary airport for the correct communications frequency.   The  special  use  airspace  alert  feature  is  three- dimensional.    The  areas  are  stored  in  the  database with    regard    to    altitude    when    the    actual    altitude limitations  are  charted  in  terms  of  Mean  Sea  Level (MSL).  Therefore, for flight above or below an area of special  use  airspace,  there  will  be  no  alert.    If  the actual  lower  limit  is  charted  in  terms  of  an  Altitude Above Ground Level (AGL), it is stored in the KLN 90B as  all  altitudes  below  the  upper  limit.    If  the  actual upper limit is charted in terms of AGL, it is stored in the KLN 90B as unlimited.