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 ETAs 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
Enter the ONLOAD or OFFLOAD weight.
Return to Alternate Flight Plan page.
Insert planned cruise leg or waypoint
crossing altitude/ flight level.
Select planned aerial refueling ONLOAD
or cargo/deliver OFFLOAD.
Insert planned loiter fuel burn rate.
Insert planned on-station loiter time.
ONLOAD / OFFLOAD. If an aerial refueling/cargo
delivery is planned during the flight plan leg, perform
1. Select ONLOAD or OFFLOAD at line
select 3L for the waypoint where the
delivery is to occur, Figure 3B-63.
2. Enter the
quantity in the scratchpad.
3. Select and press the LOAD line select
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
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