TM 1-1510-225-10 3D-56 waypoint.    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  3D-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 3D-74.  OTH 3 Page (1)   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 detected 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. d.  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 CLR  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. e.   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. CAUTION The  KLN  90B  fuel  calculations  are  based on the present rate of fuel flow, the present groundspeed,  the  present  distance  to  the destination  airport  along  the  programmed route,    and    the    amount    of    fuel    onboard entered  at  departure.    Before  takeoff,  the unit  must  be  properly  initialized  with  the amount   of   fuel   on   board.      Since   many factors   influence   the   required   amount   of fuel to reach the destination, check the fuel pages often for significant changes.  Some factors affecting the amount of fuel required are power changes, altitude changes, headwind/tailwind component changes, and routing changes.  (1)   OTH  5  Page.    The  OTH  5  page  displays the following information.  Refer to Figure 3D-75. OTH 5 KLFT   LBS FOB:   1800 REQD    740 L FOB  1060 RES:    500 EXTRA   560 Figure 3D-75.  OTH 5 Page