TM 1-1510-225-10 3A-90 (at  or  below),  if  applicable.    Only  two or three digits are required to input an altitude  (that  is,  enter  30A  and  3000A will be displayed).  Full digit entry may be used to enter an altitude.  Altitudes less than 1000 feet are entered with a preceding zero (that is, enter 054 and 54 feet will be displayed).  Any altitude entered   greater   than   the   transition level   is   converted   and   displayed   as FL. NOTE If  the  waypoint  is  part  of  a  SID,  STAR,  or approach procedure, the altitude constraint pre-fills from database. 5.   ENTER key – Press.  Cursor moves to OFFSET field. 6.   OFFSET - If applicable, insert value in nautical  miles  (-99  to  +99  range).    If offset  is  prior  to  the  waypoint,  enter the range value and a (-) will pre-fill as a default.  Enter a (+), then the range value,   to   indicate   that   the   offset   is beyond the waypoint NOTE The  cursor  moves  to  the  FPA  field  only  if the entered constraint is below the aircraft's present altitude. To   erase   the   offset   value,   insert   0   and press  ENTER  key.    The  field  will change to dashes, indicating that no offset is programmed. 7.   ENTER   key    –   Press.      The   cursor moves to the FPA field. (a)   Programming A Descent Path. NOTE The    FPA    value    field    pre-fills    with    the default   value   programmed   on   the   VNAV Data  page  if  this  waypoint  was  accessed from   the   Flight   Plan   page.      If   accessed from  the  NAV  or  Direct  To  page,  the  field pre-fills  with  the  DIR  value.    If  an  FPA  is manually     entered,     the     FPA     type     field changes to MAN. To   cancel   the   FPA,   insert   0   then   press ENTER key.  The field changes  to  dashes, indicating    no    FPA    is    programmed,    the vertical  deviation  output  is  invalid  and  no vertical deviation information will be displayed on the CDU or the EADI/EHSI. 1.   FPA  – Insert or verify (valid range is 0.1 to 6.0). 2.   With   the   cursor   over   the   FPA value,   press   the    BACK   key   to cycle through the following. a.     (DEF)  FPA  from  VNAV  Data page. b.     (AUTO) FPA if the programmed altitude is a cross  at  type  constraint  and there is a waypoint prior to the AUTO  FPA  waypoint  that  has a cross at constraint programmed.   If  no  constraint is   programmed   prior   to   the AUTO FPA constraint the system   uses   the   DEF   FPA value as AUTO. c. (DIR)  FPA  when  waypoint  is called  up  on  a  Direct  To  or Navigation page, altitude crossing is defined, and direct FPA is within valid range. 3.   ENTER key – Press. NOTE When an FPA is programmed at a waypoint,  a  G  appears  next  to  the  altitude constraint     indicating     a     glideslope     and vertical deviation information will be available.  If a glide path is programmed to a  runway  or  ARP  and  it  is  not  part  of  an approach procedure, the vertical deviation will become invalid at 1000 feet above the airport elevation. (3)   Reviewing   VNAV   Database   Waypoints.   When   SID's,   STAR's,   or   approaches   have   altitude constraints at waypoints on the procedure the system automatically   loads   the   altitude   constraints   on   the active flight plan.  The system will not load any except to cross altitudes on the Active Flight Plan page. NOTE The system will not fly a full SID or STAR procedure. (a)   Reviewing VNAV Database Waypoints Using Active Flight Plan Page. 1.   FPL  key   –   Press   to   display   the Active Flight Plan page.