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legend. The MC determines a new center position about which to construct a new SIG. Selecting the
A/C or waypoint symbol returns the SIG to the original position.
Units can be input as FEET or MTRS for elevation; FEET, MTRS, NM, or YARD for range. The
MC tests that all bearing, range and elevation data input through the UFCD are in the valid range.
Unit Valid Range
Easting/Northing
Bearing
Offset
000000 - 999999
0 - 359° 59' 59''
0 - 400,000 FT
0 - 122,000 MTRS
0 - 66 NM
0 - 133,000 YDS
When data is outside the valid range, the MC causes the word ERROR to flash in the UFCD
scratchpad and requires the data to be reinput.
24.2.7.2 TGT (Target) Programming. A target must be entered in a waypoint/OAP sequence so the
MC can calculate the groundspeed required to arrive on target at the appropriate time. Only one
waypoint/OAP can be designated as a target for all three sequences. A waypoint/OAP is identified as
a target on the waypoint data sublevel display by an inverted triangle above the waypoint/OAP number
in the waypoint/OAP sequence. At power up with WonW the previous target waypoint/OAP is cleared.
A waypoint/OAP as a target in a waypoint/OAP sequence is designated the DATA option on the
MPCD top level display, the SEQUFC option on the waypoint data sublevel display to initialize the
UFCD, and the TGT option on the UFCD. Waypoint/OAP number is entered on the UFCD keypad
and the ENT option selected. The target waypoint/OAP is undesignated by either entering the target
waypoint/OAP a second time or entering an invalid waypoint/OAP. See figure 24-8.
24.2.7.3 TOT (Time On Target) Programming. TOT pertains to the programmed target waypoint/
OAP, and is relative to the programmed ZTOD (zulu time of day). ZTOD must be programmed before
TOT can be entered. TOT is programmed from 00:00:00 to 23:59:59 and is displayed on the waypoint
data sublevel display.
A1-F18EA-NFM-000
VII-24-24 ORIGINAL
TOT is entered by selecting the DATA option on the MPCD top level display, selecting the
SEQUFC option on the waypoint data sublevel display to initialize the UFCD, selecting the TOT
option on the UFCD, entering the desired TOT value on the UFCD keypad, and selecting the ENT
option. See figure 24-8.
24.2.7.4 Groundspeed Programming. Groundspeed pertains to the desired groundspeed for the
final leg to the target waypoint in the sequence. Groundspeed values up to 999 knots may be entered.
Groundspeed is entered by selecting the DATA option on the HSI top level display, selecting the
SEQUFC option on the waypoint data sublevel display to initialize the UFCD, selecting the GSPD
option on the UFCD, entering the desired GSPD value on the UFCD keypad, and selecting the ENT
option. See figure 24-8.
24.2.7.5 Waypoint/OAP Sequence Programming. A total of three waypoint/OAP sequences are
available for waypoint/OAP sequence programming and a maximum of eight waypoint/OAPs may be
programmed in each sequence. These sequences are used for AUTO sequential steering and time on
target groundspeed cuing.
The waypoint data sublevel display on the HSI display must be used with the UFCD to allow the
pilot to program a waypoint/OAP sequence. The SEQ # option on the lower right corner of the display
indicates the waypoint/OAP sequence in use and initializes to the sequence selected on the HSI top
level display. This option selects the sequence to be programmed (SEQ1, SEQ2 or SEQ3). Selecting the
SEQUFC option, on the lower left corner of the display, initializes the UFCD for waypoint sequence
programming. A waypoint/OAP cannot appear more than once in sequence but a waypoint/OAP may
be entered in more than one sequence. Mark points cannot be programmed in a sequence. Each
waypoint/OAP entered is placed to the right of the last waypoint/OAP in the sequence. If 15
waypoints/OAPs are programmed, the first waypoint in that sequence is deleted and the remaining
waypoints/OAPs move to the left one space. Data for the current waypoint/OAP inserted/deleted in
the sequence is provided on the waypoint data level display.
A new waypoint/OAP sequence is programmed by selecting:
1. The waypoint data sublevel display using the DATA option
2. The desired sequence route number using the SEQ # option
3. The SEQUFC option to initialize the UFCD for sequence programming
4. The INSERT option on the UFCD
5. The desired waypoint/OAP number via the UFCD keypad
6. The ENT option on the UFCD keypad.
Repeat steps 4 through 6 for each waypoint/OAP in the sequence. See figure 24-8.
Waypoints/OAP are inserted into an existing sequence by selecting:
1. The waypoint data sublevel display using the DATA option
2. The desired sequence route number using the SEQ # option
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NATOPS Flight Manual 飞行手册 2(99)
