TM 1-1510-218-10 3B-45 position to the selected waypoint.  Not updated as the present position changes. BRG TO ^– The  bearing  in  degrees  from the  aircraft's  present  position to the selected waypoint.  Not updated as the present position changes. ENTER GS: ^– The aircraft's estimated groundspeed  for  the  trip  can be entered in this data field. ETE H: M ^– The  estimated  time  en  route for the trip based on groundspeed. (4)   Fuel Planning Page. REM ^– The    total    fuel    remaining    in pounds.      Must   be  manually inputted. Automatically counts  down  as  a  function  of time and the manually entered fuel flow. FLOW: ^– The   total   fuel   flow   in   Ib/hr.   Must be manually input. RESERVE: ^– The   desired   fuel   reserve   in pounds.      Must   be   manually input. LAST UPDATE ^– Time    in    minutes    since    the pilot  has  updated  any  of  the fuel  planning  data.    After  15 minutes    the    HRS,    RANGE, and   NM/100   LB   fields   blank and an UPDATE INPUTS message flashes at the bottom of the page. HRS ^– The  endurance  in  hours  and minutes based upon the manually inputted fuel remaining,  fuel  flow  and  fuel reserve data. RANGE (NM) ^– The   range   in   nautical   miles based   upon   endurance   and the aircraft's present groundspeed as calculated by the system. NM/100LB ^– The  aircraft's  fuel  economy  in nautical   miles   per   100   Ib   of fuel  based  upon  the  present groundspeed     and     manually input fuel flow. UPDATED INPUTS ^– This flashing message appears  only  if  data  has  not been updated for 15 minutes. (5)   Position   Summary   Page.      The  position summary    page    displays    the    airc raft's    position    in latitude  and  longitude  coordinates  as  determined  by each of the sensors. POS ^– The  aircraft's  present  position coordinates  based  on  inputs from the pilot selected sensor.   When     BLEND     sensor     has been  selected  this  position  is a computer optimized position that blends the position information from all the sensors. VOR ^– The  aircraft's  present  position coordinates  based  on  inputs from   the   VOR   and/or   DME sensors. TACAN ^– The  aircraft's  present  position coordinates  based  on  inputs from the TACAN sensor. NEXT PAGE? ^– The NEXT PAGE field displays,    indicating    that    the remaining  sensors  (GPS)  are displayed  on  the  next  page.   The next page is displayed by placing   the   cursor   over   this field and pressing the  ENTER key. (6)   VOR/DME/Status Page.   The VOR/ DME status page may be used to monitor the VOR and/or DME stations being used by the system. VOR 1 REC ^– Indicates that the NAV sensor has tuned a programmed VOR station frequency.  REC indicates     that     a     valid     (not flagged) signal is being received, and the station radial  on  which  the  aircraft  is located. DME 1 REC ^– -Indicates that the DME sensor is tuned to a programmed paired VOR frequency.    REC  indicates  a valid   (not   flagged)   signal   is being  received,  and  distance from the station to the aircraft.