TM 1-1510-218-10 3-58 OTH   1   pages,   one   for   each   of   the   two   points   of contact.    The  name  of  the  FSS  is  at  the  top  of  the page.    There  can  be  from  one  to  four  frequencies.   Where   it   is   possible   to   communicate   with   FSS   by transmitting  on  VHF  and  receiving  on  the  VOR,  the OTH   1   page   displays   the   frequencies   to   use   for transmit  and  receive  and  also  the  name  of  the  VOR being used. (b)  In    some    parts    of    the    world,    HF communications  are  used  for  these  services.    These frequencies are displayed where appropriate. NOTE Frequencies  for  Area  Control  Centers  are displayed   on   the   OTH   2   page   for   some areas of the world. (2)   Frequencies  for  Air  Route  Traffic Control Centers  (Other  2).    The  KLN  90B  also  stores  in  its database  the  low  altitude  boundaries  of  each  of  the ARTCC Centers.  The KLN 90B determines the proper Center  to  contact  and  the  appropriate  frequencies  to use  for  the  aircraft's  present  position.    The   OTH   2 page is used to display this information. (3)   Deleting  User-Defined  Waypoints  (Other 3).  A listing of all user-defined waypoints is contained on  the  OTH  3  page.    The  user-defined waypoints are listed by category; airports (A) are first, VOR's (V) are second,   NDB's   (N)   are   third,   intersections   (I)   are fourth,    and    supplemental    (S)    waypoints    are    last.   Within each category, the waypoints are alphabetized by  identifier.    To  the  right  of  the  identifier  is  the  type waypoint (A, V, N, I, or S).  If the waypoint is used in a flight plan, the flight plan number is shown to the right of  the  waypoint  type.    Refer  to  Figure  3-74.    If  more than five user waypoints exist, it is necessary to press the left  CRSR button and then use the left outer knob to scroll through the complete list. OTH 3 USER WPTS FARM  A   6 L29   A  24 AAA   V ND1   N INT15 I Figure 3-74.  OTH 3 Page (a)  Deleting A User Waypoint. 1.   Select the OTH 3 page. 2.   Press  the  left    CRSR   button   and use the left outer knob to move the cursor   over   the   waypoint   to   be deleted.      If   more   than   five   user- defined waypoints exist, it is necessary   to   use   the   left   outer knob  to  scroll  through  the  list.    A waypoint  contained  in  a  flight  plan cannot    be    deleted    without    first either   deleting   the   waypoint   from the flight plan or deleting the entire flight plan. 3.   Press     the     CLR     button.          The waypoint  page  for  the  waypoint  to be   deleted   appears   on   the   right side. 4.   Press the ENT button. 5.   Press the left  CRSR button to turn off the left cursor function. (4)   Deleting  Airport  Remarks  (Other  4).  The OTH  4  page  includes  a  listing  of  all  airports  whose APT 5 pages contain remarks.  To delete a previously entered  remark,  select  the  OTH  4  page,  position  the cursor   over   the   desired   airport   identifier,   press   the clear button, and then press the   ENT button.  If there are  more  than  five  airports  with  remarks,  use  the  left outer knob to scroll the cursor down the list to find the desired airport identifier. (5)   Fuel  Management  (Other  5  through  8).   The  installation  of  the  Army  Engine  Trend  Monitoring System (AETM) allows the KLN 90B to interface with real  time  fuel  management  data  so  that  the  system can continuously compute the amount of fuel required to reach the destination and the amount of fuel that will be   on   board   upon   reaching   the   destination.      The AETM  continuously  sends  the  rate  of  fuel  flow  to  the KLN  90B.    The  KLN  90B  continuously  calculates  the aircraft's  distance,  groundspeed,  and  estimated  time en route to the destination waypoint.  The fuel required to reach the destination waypoint is the ETE multiplied by  the  current  rate  of  fuel  flow.    The  amount  of  fuel remaining   at   the   destination   is   the   amount   of   fuel presently  remaining  minus  the  fuel  required  to  reach the destination.