TM 1-1510-225-10 3A-60 NOTE If    the    destination    airport    or    runway    is manually  entered,  or  if  the  airport/runway is   loaded   from   the   database,   the   airport elevation  will  be  displayed  in  the  altitude field.    If  the  flight  plan  is  loaded  through AFIS,    the    airport    elevation    will    not    be available. (3)   EST CROSSING. The estimated crossing  altitude  (EST  CROSSING)  is  the  altitude  at which  the  aircraft  is  estimated  to  be  when  it  crosses the  TO  waypoint  based  on  its  current  groundspeed and   vertical   speed   (displayed   for   the   active   vertical waypoint). (4)   PLAN CROSSING.  PLAN CROSSING is system   determined   crossing   based   on   programmed constraints and flight path angles for descent.   Displayed for other than active vertical waypoint. (5)   OFFSET.  OFFSET displays pilot value in nautical   miles   ( -99   to   +99   range)   where   a   positive entry  (+)  indicates  an  offset  beyond  the  waypoint  and a negative (-) entry is prior to the waypoint. NOTE Pilot must enter the leading (+) sign for the offset  to  be  beyond  the  fix,  but  a  (–)  pre- fills as a default to cross prior to the fix. (6)   REQ   FPM.      Required   feet   per   minute (REQ FPM) displays the required vertical speed in feet per minute that the aircraft must maintain to reach the vertical   waypoint.      UP   indicates   a   positive   vertical speed  and  DN  indicates  a  negative  vertical  speed  is required. NOTE If  PLAN  CROSSING  is  displayed,  the  REQ FPM  is  the  planned  vertical  speed  for  the waypoint. (7)   FPA.  FPA  displays  the  flight  path  angle for path descent to waypoint in degrees and hundredths of a degree with a valid range of 0.1 to 6.   The following may appear in parentheses. (a)   DB.      Displays   FPA   from   Database (DB). (b)   MAN.      Displays    manually    entered FPA. (c)   DIR.      Indicates   that   a   direct   (DIR) flight path angle has been programmed. (d)   AUTO.    Automatic  (AUTO)  indicates a system computed FPA. (e)   DEF.   Indicates that flight path angle is a default (DEF) from the VNAV Data page. NOTE DIR,   AUTO,   and   DEF   can   be   accessed using the BACK key. (8)   DIRECT  FPA.    Displays  the  direct  flight path   angle   (DIRECT   FPA)   from   the   current   aircraft altitude  to  the  vertical  waypoint  in  degrees  and  tenths  of a degree (valid range 0.0 to 90.0).  DN indicates a negative FPA and UP indicates a positive FPA. j.    Planning Pages (PLAN Key). (1)   Plan   1/5   Page,   Fuel   Status.    Refer  to Figure 3A-38. Figure 3A-38.  Plan 1/5 Page, Fuel Status (a)   FUEL   STATUS   LB.      This    display indicates that fuel data is being computed in pounds.   This unit can be manually changed to kilograms (KG), if desired, by using the  BACK key. (b)   REMAINING.  This display shows the total  fuel  remaining  on  board  in  pounds  or  kilograms.   This quantity must be initially entered or verified by the pilot and may require periodic verification or update. (c)   RESERVE.    This  display  shows  the desired reserve in pounds or kilograms.  This quantity may require periodic verification or update. (d)   FLOW.        This    display    shows    the current  fuel  flow    in  pounds  or  kilograms.    Fuel  flow data is input automatically from the fuel flow