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4-105
TM 1-1520-248-10
b. BLOCK 1 MISSILE. Breakups in tone indicate that the missile
has a marginal track of the target and
WARNING should not be fired. This is particularly
i m p o r t a n t d u r i n g t h e 2 s e c o n d s
immediately before firing a Block 1
missile. • Stinger missile types (Block 1 and
RMP) shall not be mixed in any • The CPG should monitor the pitch ladder
mission load-out. It is absolutely during the engagement process, alerting
imperative that the aircrew is aware of the pilot if the helicopter nose is pitched
which Stinger missile type has been down more than 5 degrees. I f t h i s
uploaded. Firing an RMP missile condition exists, the missile shall not be
without superelevation may result in fired.
the missile’s early contact with the
ground and subsequent debris striking a. Target Establish target track with MMS.
the helicopter. Block 1 missiles are
stenciled with 1/2-inch yellow block b. Laser range finding Complete as desired.
letters (Block 1) on the exterior of the
t u b e . T h e B l o c k 1 s t e n c i l i s c. WPN/ASE switch Select ATAS sparse
approximately mid-way between the weapons VSD.
sight frame and aft end of the tube.
d. SLAVING key Select seeker slaving • A Block 1 MSL shall not be fired if the mode as required.
pitch ladder indicates the helicopter
nose is pitched down more than 5 e. UNCAGE key Select uncage mode as
degrees because terrain impact is required.
possible.
• ATAS missiles are not to be launched f. MASTER switch ARMED.
when ambient temperature exceeds 140
°F. The missile could deflagrate when 2. Pilot.
the motor ignites.
a. WEAPON SEL switch Select ATAS.
CAUTION
b. SLAVING mode Verify as required.
To prevent damage to the captive flight c. UNCAGE mode Verify as required.
tmraininueter s(C oFfT c) oonr tminiusosuilse sa, cdtoiv antoiot ne xfcoere tdh 3e d. MSL ACTVT switch Press.
Block 1 MSL. e. Maneuver helicopter to place MMS LOS cue
1. CPG. (sdymiabmool n(dcr)o sosv eart tcheen twere aopf odnissp lraeyf)e, rewnhcilee
NOTE maintaining a minimum 10-foot AGL hover.
NOTE
• Superelevation is not required when firing
a Block 1 missile. However, all other The seeker slaving mode, when equipped
visual and audio constraints apply. and enabled, allows the pilot to acquire
without meticulous alignment of the • MMS prepoint should be checked prior to helicopter (hence missile) to the target.
using the MMS method of engagement. If Aligning the weapons reference symbol to
the prepoint target is not in the MMS within 6 degrees of the MMS LOS cue prior
NFOV, an Airborne Calibration should be to pressing the WPN-FIRE switch to the first
performed. detent is normally adequate to acquire the
• Estimated range must be within missile’s target. Firing constraints remain unchanged
capability. in the seeker slaving mode.
• The CPG should monitor missile tone f. If Slaving is enabled, place weapons
during the engagement process, alerting reference symbol to within 6 degrees of
the pilot to momentary breakups in tone. MMS LOS cue.
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TM 1-1520-248-10
j. Pitch attitude Check pitch ladder to
g. WPN-FIRE switch Press to first detent ensure that helicopter nose is not pitched
and hold to uncage missile seeker. down more than 5 degrees before firing.
Verify that an uninterrupted high tone is
NOTE present.
k. WPN-FIRE switch Press and hold for one
Noise from an operating heater will degrade second.
radio and intercom communication and the
ability of the pilot and CPG to properly
distinguish ATAS acquisition tone. 3. MASTER switch Set as required.
h. Verify Tracking reticle stable with MMS
LOS cue. 4-77. BEFORE LEAVING HELICOPTER
PROCEDURES.
i. Verify ATAS audio tone.
1. Ejector rack safety pin(s) Install.
NOTE
2. IR cover(s) Install on remaining missile(s).
• Do not activate missile until target has
been identified and engagement i s 4-78. MALFUNCTION ATAS MISFIRE.
imminent. A fully charged coolant bottle
(6000 psi) will provide forty 45-second
A misfire is a missile that has been fired but the launch
engagements. Do not exceed 5 minutes of
motor does not ignite.
continuous activation for the basic MSL
and 3 minutes for the RMP and Block 1
MSL. NOTE
• Low pressure (less than 3500 psi) in the
coolant bottle causes LOW to display on After pressing the WPN-FIRE switch to the
the PDU on the side of the PDU on which second detent and releasing it, the missile
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(122)
