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LOBL azimuth constraint driver.
MMS LOS, when receiving properly coded laser energy.
(CDS4) LOBL/LOAL constraints box size doubled. Constraints box now represents 20°
(LOBL) and 7.5° (LOAL).
NOTE
Range constraint drivers do not apply. Proper range to the target should be
confirmed by the crew.
Figure 4-64. HELLFIRE Sparse VSD (Sheet 1 of 2)
4-113
TM 1-1520-248-10
(Cont)
CONTROL/INDICATOR FUNCTION
4. W HOT/B HOT/NORM/INV When TIS is selected, toggles between W HOT and B HOT. With TV selected
key at R-2, on IMSP/MMS configuration, toggles between NORM (normal video)
and INV (inverted video).
5. Laser Code Displays laser code selected for missile.
6. Range to target Displayed boxed if current range. “L” indicates laser range; “P” indicates
prepoint range; “N” indicates distance to direct fly to waypoint.
(CDS4) Range is boxed if current laser range is being displayed. Range is not
boxed if last valid laser range is used. Display is boxed while laser is firing and
for 5 seconds after laser firing has stopped.
7. HELLFIRE missile status Displays current missile status.
Blank Missile not selected.
SEL Missile selected.
RDY Missile ready.
TRK Missile tracking.
BF Missile failed BIT.
MF Missile failed/Missile battery failed/Missile failed to accept laser code/
Missile failed to uncase.
UNL Missile unlatched.
SF Remote terminal bad/Station failed.
HF Hangfire in progress/Missile hangfired.
8. Missile selected box Indicates missile selected for firing.
9. Missile symbology Indicates missile presence.
10. DELVRY key Selects delivery modes for HELLFIRE missiles (rotary function).
LOBL Missile acquires and locks on coded laser energy prior to launch.
LO Missile trajectory low profile to clear terrain mask and locks on coded
laser energy as missile closes with target.
HI Missile trajectory high profile clears terrain mask and locks on coded
laser energy as missile closes with target.
DIR Missile trajectory direct when ceiling is too low for successful LOBL
firing.
11. Status and PRI/ALT laser Indicates primary and alternate codes. If no codes are present, only the comma
codes will be displayed. Also provides status (ARMED, SAFE, or OFF).
12. LAUNCH key Selects launch sequence for HELLFIRE missiles (rotary function).
STBY System in standby.
MAN Missile is manually selected for firing.
NORM Missiles step in normal sequence when fired.
RIPL Missiles are fired in rapid succession with alternating laser codes.
13. CONSTR key Selects HELLFIRE missile constraints (toggle function).
NORMAL HELLFIRE launches when in constraint.
ORIDE HELLFIRE may be launched without meeting launch constraints.
14. HELLFIRE time-of-flight Indicates missile time-of-flight based on pressure altitude and temperature.
Figure 4-64. HELLFIRE Sparse VSD (Sheet 2 of 2)
4-114
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. Laser Code Indicates laser code assigned for the missile.
2. Missile Symbology Indicates missile presence.
3. Laser Indicates MMS laser status/code.
PRI=Primary Missile Code.
ALT=Alternate Missile Code.
4. PRI/ALT CODES key When pressed legend blanks and is replaced by a cursor allowing laser
codes to be entered for priority assignment.
NOTE
PRI/ALT displays only if launch mode is in STBY.
5. DEICE key When pressed DEICE will box and protective domes on missiles will
jettison.
Figure 4-65. HELLFIRE WEAPONS PAGE (Sheet 1 of 2)
4-115
TM 1-1520-248-10
(Cont)
CONTROL/INDICATOR FUNCTION
NOTE
DEICE displays only if DELVRY mode is LOBL.
6. WEAPONS BIT/SET-UP Selects WEAPONS BIT/SET-UP PAGE.
PAGE key
7. MSL STATUS OFF-ECCM disabled.
Blank Missile not selected.
SEL Missile selected.
RDY Missile ready.
TRK Missile tracking.
BF Missile failed BIT.
MF Missile failed/Missile battery failed/Missile failed to accept laser
code/Missile failed to uncase.
UNL Missile unlatched.
SF Remote terminal bad/Station failed.
HF Hangfire in progress/Missile hangfired.
8. ECCM key Toggles ECCM ON or OFF.
NOTE
ECCM disables only if launch mode is not in STBY.
9. TOGGLE MISSILE CODE Toggles switching primary and alternate laser codes and missile
key selected.
Figure 4-65. HELLFIRE WEAPONS PAGE (Sheet 2 of 2)
(b) UNL Displays if the RHE has detected (d) TRK Displays when the missile has
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(125)
