TM 1-1510-225-10 3B-100 The   waypoint   departure   and   arrival   times   for each   leg,   shows   elapsed   time   from   takeoff   (i.e., assume a default takeoff time of 00:00).  If a required departure  or  waypoint  arrival  time  is  entered  then  the times are fixed times with respect to the entered value.   The  alternate  flight  plan  ETA’s  are  calculated  to  each waypoint   using   the   waypoint   wind   and   TAS   entries provided for each waypoint on the leg A pages. Only  one  required  time  may  be  entered  in  the alternate  flight  plan,  either  the  first  departure  time  or any waypoint arrival time.  The  * indicates an entered required  time  versus  a  computed  departure  or  arrival time.  If a loiter/hold/pattern on-station elapsed time is entered  on  the  Leg  C  page,  the  arrival  and  departure times  for  a  waypoint  will  differ  by  that  planned  loiter time.    If  a  fuel  onload  or  cargo  offload  is  entered  at  a waypoint,  the  arrival  and  departure  fuel  and/or gross weight   will   differ   by   the   entered   amount.      Refer   to Figure 3B-63 and Table 3B -47. (7)   Entry   and   Display   of   Planned   Altitude.   On  the  Leg  C  page  optional  entries  of  the  planned cruise altitude/flight level and bank command limit for each leg may be made.  Each altitude/flight level entry is   transferred   to   the   active   flight   plan   when   the alternate flight plan is transferred. (8)   Entry   and   Display   of   On-Station  Loiter Time and Fuel Parameters.  If the mission includes an aerial refueling pattern,  holding pattern, MFP, or other loiter on-station at a waypoint, enter the planned loiter time  and  fuel  burn  rate  on  the  Leg  C  page.    This  will cause  the  total  mission  time  and  fuel  calculations  to accommodate  the  planned  loiter.    If  an  intermediate landing  without  refueling  is  planned,  enter  the  ground time  with  no  fuel  burn  (or  use  another  alternate  flight plan for the next segment). Figure 3B-63.  Alternate Flight Plan Leg C Page Table 3B-47.  Alternate Flight Plan Leg C Page NO. DESCRIPTION/FUNCTION 1 Enter the ONLOAD or OFFLOAD weight. 2 Return to Alternate Flight Plan page. 3 Insert   planned   cruise   leg   or   waypoint crossing altitude/ flight level. 4 Select  planned  aerial  refueling  ONLOAD or cargo/deliver OFFLOAD. 5 Insert planned loiter fuel burn rate. 6 Insert planned on-station loiter time. (9)   Entry and Display of Fuel/Weight ONLOAD  /   OFFLOAD.      If   an   aerial   refueling/cargo delivery  is  planned  during  the  flight  plan  leg,  perform the following: 1.   Select  ONLOAD or  OFFLOAD at line select  3L  for  the  waypoint  where  the delivery is to occur, Figure 3B-63. 2.   Enter     the ONLOAD     / OFFLOAD quantity in the scratchpad. 3.   Select and press the  LOAD line select key. If an  ONLOAD is entered, the FMS-800 assumes that the loaded quantity is usable fuel and increments both the departure gross weight and fuel remaining at that  waypoint.    In  this  case,  the  REQD  and  TOTAL (mission)   fuel   on   the   Fuel   Summary   page   will   be greater than the initial ramp fuel loaded on the Init Fuel page. If  an  offload  is  entered,  the  FMS-800  assumes that  it  is  either  an  airdrop  payload  or  a  tanker  aerial refueling offload; i.e., it will reduce the gross weight but not the usable fuel remaining at that waypoint. (10)   Alternate   Flight   Plan   Loading   To/From the  Data  Cartridge.    The  alternate  flight  plan  may  be transferred to or from one of forty alternate flight plan files  located  on  the  data  cartridge.    Paragraph  3B-19d describes  the  initial  preflight  loading  of  an  alternate flight  plan  on  the  Start  3  page  via  either  entering  the plan number or label, or accessing the Alternate Flight Plan Catalog page. To  save  an  alternate  flight  plan  that  has  been created  or  modified  on  a  CDU  to  the  data  cartridge, access the Alternate Flight Plan Catalog page from the Alternate Flight Plan page.  The line select keys on the Alternate  Flight  Plan  Catalog  page  do  not  operate  as they do when this page is accessed from the Start 3