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indication if the IRST is failed (Figure 2-96). The radar
mode alphanumerics are as follows:
1. Hot range while search (HRWS)
2. Manual rapid lock-on (MRL)
3. Pilot automatic lock-on (PAL)
4. Pilot lock-on mode (PLM)
5. Pulse Doppler search (PDS)
6. Pulse Doppler single-target track (PDSTT)
7. Pulse search (PS)
8. Pulse single-target track (PSTlJ
9. Range while search (RWS)
10. Range while search velocity (RWS)
11. Sniff (SNIFF)
12. Standby (STBY)
13. Track while scan automatic (TWSA)
14. Track while scan manual (TWSM)
15. Vertical scan lock-on high (VSLHI)
16. Vertical scan lock-on low (VSLLO).
ORIGINAL 2.172
NAVAIR 01.F14AAD-1
AWL/FLIGHT DIRECTOR
TACAN
W
5- 15
1 BOOR
/ TCN 12.5 \
(AT,I-F5OD-332-O
Figure Z-94. HUD Added Symbology (Sheet 1 of 2)
2-173 ORIGINAL
NAVAIR Ol-FlUAD-
* 1 I.I~“L l-VI.&. I IVI.
0
Command heading This symbol indicates the heading required to achieve the selected course.
marker Course selection may be manual, data link commanded, or waypoint
destination. Where commanded heading is beyond display scale limits, the
symbol will be pegged at the nearest edge to the commanded heading.
This symbol does not appear on the basic or tacan formats.
0
Waterline Indicates fuselage reference line (FRL). Displayed when attitude
information is not valid. Also displayed when gear down or TLN Gear Up
or, the flight path marker is at or beyond the HUD’s full field of view.
0
Breakaway, waveoff A large flashing X will appear in both D/L and AWL steering modes if a
WAVEOFF command has been received.
@ ILS precision course Consists of two independent vectors (vertical and horizontal) which form a
vectors cross pointer. The horizontal vector responds to ILS glide slope error and
the vertical vector responds to ILS localizer error. Null/center indications
are provided to enable the pilot to null the error and keep the vertical and
horizontal needles centered.
0 AWL legend This message indicates that the all weather landing steering mode has
been selected.
@ Range Depending on the format, this message will indicate either the range to the
tacan station, data link destination or distance to waypoint destination. The
legends TCN, D/L, or WPT, may also appear. When in the manual steering
mode no range appears but the MAN legend is displayed.
0 Extended horizon line Indicates the horizon with respect to the aircraft with landing gear down.
Changes orientation with any change in aircraft pitch and roll.
@ gg;gyd
The course arrow represents the selected course to the tacan station. Two
dots will appear on the side of the flight path marker toward the course
arrow and perpendicular to the arrow. The dot closest to the flight path
marker represents a half scale deflection of 4” off course, while the
outermost dot represents full scale deflection of 6” off course. When the
aircraft crosses the selected course, the arrow moves to the opposite side
of the flight path marker and the dots would appear on that side. For
deviations of more than 9”, the arrow pegs. If the arrow is centered on
course, the dots disappear. Flight path marker centered over the course
arrow indicates being on course. For tacan bearings aft of f90”. the arrow
will be dashed.
@
Angle-of-attack The AOA bracket is a pitch related variable that indicates the deviation of
bracket the current AOAfrom a desired value and is vertically referenced to the left
wing of the flight path marker symbol. The center of the bracket represents
the optimum AOA. The bracket moves lower with respect to the flight path
marker as AOA increases and it moves higher as AOA decreases.
@ Flight director The flight director symbol provides glide slope and centerline steering
information computed by the mission computer using navigation system
parameters and Data Link information from the SPN-42/46 ACLS system.
The box with the three dots will provide the pilot with optimal glide path
intercept and following when the flight path marker is inside the flight
director box and the three dots are aligned with the wings and the tail of
the flight path marker. The same procedures are used whether the flight
path marker is caged or uncaged. The flight director symbol is removed
from the HUD when the FLT DIR pushbutton on the VDI is unboxed.
0 ACL steering indicator Provides ACL steering commands driven by the ASW-27C data link.
ORIGINAL
Figure 2-94. HUD Added Symbology (Sheet 2 of 2)
2-174
NAVAIR 0%F14AAD-1
FORMAT
DATA
SYMBOL BASIC AWL LINK DESTINATION MANUAL TACAN
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F-14D 飞行手册 Flight Manual 1(148)
