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Table 4-15. Weapons Symbology Definitions - continued
Fig. 4-17 Ref No.
C
D
E
F
G
Q
O
I
H
J
N
Symbol Name
CPG LOS
Heading Scale
Cued LOS Reticle
Missile Constraints
Radar Altitude
Selected Sensor
TADS FOV Gates
Cued LOS DOT
Field of View
Sensor Field of
Regard
High Action Display
Description
Indicates relative bearing of CPG selected LOS.
Helicopter magnetic heading scale.
A virtual reticle indicating the cued LOS to the appropriate crew
member. Used with the cueing dots.
Indicates the required orientation to align the helicopter into
constraints for Hellfire missile engagements. When all
constraints for the mode of engagement are satisfied, the box
will go from ‘dashed’ to ‘solid’.
A digital display of radar altitude. Displays in l-foot increments
to 50 feet and in 10-foot increments above 50 feet.
Displays the name of the TADS selected sensor. Also when
FD/LS detects a fault in the continuous monitor mode, the
message ‘FD/LS’ will alternately flash with the sensor name.
Indicate the amount of the currently displayed imagery of TADS
that will be displayed in the next narrower FOV.
Indicates the cued LOS location within the field of regard. The
cued LOS DOT will flash when the HARS inertial platform has
gone into the free inertial mode.
Represents the instantaneous FOV of the crewmember sensor
within the field of regard.
Represents the total gimbal limits possible for the respective
crewmember sensor.
Refer to paragraph 4.28.
4-45
TM 1-1520-238-10
L
Table 4-15. Weapons Symbology Definitions - oontinued
Fig. 4-17 Ref No. Symbol Name Description
P Rocket Steering Indicates the required orientation to align the helicopter into
Cursor constraints for 2.75 inch FFAR rocket engagements. During
fixed or flight stow rocket delivery, a broken I beam will appear.
Airspeed A digital display of true airspeed when the ADSS is turned on or
not failed. If the ADSS is OFF or failed, display is ground speed
in knots from the doppler navigation system. Range is 0 to 200,
omnidirectional.
4..27 FIRE CONTROL SYSTEM MESSAGES. prompts are displayed in the high action display (HAD)
The fire control system displays to the crewmembers
or the alphanumerical display (AND) contained in the
TADS ORT.
messages and prompts for management of the subsystems
on board the helicopter. The messages and
4-46
CAUTION
TM 1-1520-238-10
4.28 HIGH ACTION DISPLAY (HAD).
With the PLT/GND switch in the
ORIDE position and the CPG SIGHT
SELECT switch set to NVS, the HAD
is disabled. The 30mm gun can be actioned
without any messages in
weapon control or weapon status.
This can result in damage during
takeoff or landing if the 30mm gun is
actioned and depressed inadvertently.
The HAD (fig 4-18) provides information to the pilot
and CPG for use in operation of the mission equipment.
The HAD is located along the bottom of the displayed
symbology and is split into two fields by the gimbal limits
box. The two fields on either side of the gimbal limits
display are further subdivided for a total of four message
fields: sight status, range and range source on the
left, weapon status, and opposite crew station weapon
control. Tables 4-16, sight status, 4-17, range and range
source, 4-18, weapons status, and 4-19, opposite crew
station weapon control list the messages and location.
Figure 4-18. High Action Display
4-47
TM 1-1520-238-10
Table 4-16. High Action Display Sight Status
Crewmember Message Description
P/CPG IHADFAIL The IHADSS has been detected as NO-GO for that crew
station by FD/LS. The IHADSS LOS defaults to fixed
forward for the affected crew station.
P/CPG BORESIGHT REQUIRED IHADSS boresight required.
P/CPG IHADSLOS INVALID The IHADSS SEU has computed an invalid LOS for
that crew station. This can be caused by the
crewmembers head outside of the head motion box or
blockage of the line-of-sight between the SSU and the
helmet. The IHADSS LOS is frozen at the last valid
computation until the LOS is computed as valid.
P PNVSFAIL FD/LS has detected the PNVS turret or electronics as
NO-GO.
P PNVS NOT COOLED The PNVS FLIR has not cooled down for optimum
performance; cool down time should not exceed 20
minutes.
P PNVS DIRECT FD/LS has detected the TADS Electronics Unit (TADS
computer) as NO-GO. The PNVS turret is being
directed by the IHADSS SEU. The PNVS turret
　
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