BOH - POD WITH
CMDS AND MAW
BOH - ADVANCED MISSILE THREAT DETECTION
AND COUNTERMEASURES CAPABILITY
BOH is a highly effective countermeasures
self protection pod for use
on any fixed wing aircraft. BOH provides
covert sustainable pre-emptive
dispensing, missile warning, forward
firing of flares and cocktail dispensing.
All these capabilities have been incorporated
into the form-factor of a missile
utilizing the well established AIM-9
Sidewinder and AIM-120 AMRAAM
interfaces and characteristics for lean
BOH is an implementation of the Saab BOL
Countermeasures Dispenser System (CMDS)
and Compact Integrated Defensive Aids Suite
(CIDAS) into the shape of a missile.
The BOH is modular and can be arranged in
a multitude of configurations. The building
blocks are: MAW, pyrotechnical dispenser,
controller, laser sensor and electromechanical
dispenser modules. The countermeasures
dispensing is characterized by providing long
duration pre-emptive dispensing capability
with the BOL dispenser as well as forward
firing flare capability with the BOP dispenser
and it is designed to defeat all modern
IR-guided threats. The dispensers cater for
highly effective flare cocktail capability. The
dispensing system also caters for highly effective
The BOH pod can be mounted on any missile
launcher capable of launching AIM-9
Sidewinder or AIM-120 AMRAAM type of
missiles. The BOH has mass properties of an
Pyrotechnically dispensed propelled flare Electromechanically dispensed chaff Electromechanically dispensed
pyrophoric material (IR)
No. 218 K7 Type 1 propelled flare BOL Chaff BOL IR
The Electronic Warfare Controller (EWC)
hardware and software performs the following
• Defensive Aids Control
• Missile Approach Warning Analysis
• Decoy Dispensing
MISSILE APPROACH WARNING
The module consists of 2 MAW-300 sensors
interfacing with a processing card in the
EWC. Each sensor is an optical staring sensor
that reports the azimuth, elevation and amplitude
characteristics of the most prominent
UV sources in its Field Of View (FOV) to the
EWC. Each sensor has a 110 degrees conical
FOV. The EWC performs the Built-In-Test
control and management of the MAW sensors.
The MAW analysis consists of dedicated
hardware and software functions that receive
the processed data from the sensors. Tracks
are formed from the sensor data and are
evaluated based on their temporal irradiance
and spatial modulation characteristics. If the
track is classified as an emission originating
from a missile on a converging flight path,
a MAW alarm is issued. Missile alarms are
transferred to the Defensive Aids Controller
for display and countermeasures management
DEFENSIVE AIDS CONTROL FUNCTION
The Defensive Aids Controller performs
the high level integration, management and
control of the sub systems as well as external
interfacing to the avionics systems. Alarm
data is received from the aircraft warning sub
system. Weapon systems matching and management
is performed based on the User Data
File (UDF) data. Control unit outputs are
generated and countermeasures responses are
assigned based on weapon system identification
and priorities as defined in the UDF. A
central data record function is also managed
by the Defensive Aids Controller.
DECOY DISPENSING FUNCTION
The decoy dispensing function consists of
dedicated hardware and software functions
that interface to and manage the pyrotechni-
Electronics Unit for
Pyrotechnical Dispenser EWC
cal BOP and electromechanical BOL dispensers.
Countermeasures patterns and sequences
are stored and initiated via Defensive Aids
commands. Payload data, mode data and dispensing
data are transferred to the Defensive
Aids Controller for display purposes.
COUNTERMEASURES DISPENSER, BOP
The BOP is a light weight pyrotechnical dispenser
holding 30 1”x1” or 15 2”x1” standard
8” long payloads, also US Navy round formfactor
payloads can be accomodated. The
dispenser is fully integrated with the EWC
functionality and provides for misfire detection
and compensation, intelligent magazine
recognition and quick loading.
The minimum time between two firing pulses
from a single BOP is 10 ms.
The BOL is a light weight electromechanical
dispenser holding 160 BOL-chaff or BOL-IR
payloads. The dispenser is fully integrated
with the EWC functionality and provides
quick loading thanks to its unique built-in,
tool-less locking mechanism.
Safety Pin Unit BOL
BOH is designed to interface with any missile
launcher. The mass and center of gravity
properties are similar to those of an AIM-9
Sidewinder missile and aerodynamic properties
are similar to those of an AIM-120
The BOH can be integrated with MIL-
STD-1553 or RS-485 data links to adapt to
other displays and control means. To further
simplify integration, wireless technology can
MODES OF OPERATION
The BOH has the following dispensing modes:
Manual initiation of dispense programs can be
performed at all times.
Backup dispensing can be performed based
on a graceful degradation philosophy, should
parts of the system fail.
• Probability of Warning, POW, is >99 %,
provided the threat is within the field of view
coverage of the front mounted MAW module.
• Response time, time to impact, has been
optimized for the use of reactive pyrotechnic
countermeasures while maintaining a low
false alarm rate.
• Data logging is provided for through recording
of processed declared missile events,
built-in-test and inertial navigation data.
• Countermeasures dispensing: The forward
module BOP pyrotechnical dispenser is oriented
with a depression angle of 40 degrees
firing downward/forward. The rear part of
the BOH houses the BOL electromechanical
dispenser releasing the payload aft into the
slipstream of the aircraft.
Specifications subject to change without notice
HUMAN MACHINE INTERFACE, HMI,
AIRCRAFT OPERATOR LEVEL
• MAW generated THREAT ALARMS can be
indicated on displays.
• BUILT-IN-TEST results are indicated on
aircraft displays and on a built-in indicator
on the BOH maintenance panel while on the
• REMAINING LOAD can be indicated on
• JETTISON. It is possible to jettison all remaining
pyrotechnical load from the BOH pod.
• The BOH pod has a Ground Support Interface
that provides the ground crew with builtin-test
and power indications, ground based
end-to-end testing, initiated built-in-test and
an Ethernet based data port.
• A Chaff Flare Test Block (CFTB) emulating
a loaded magazine can be used for ground
testing of the BOP dispenser.
• A Zero Volt Tester can be used to make sure
no voltage is on the BOP dispenser during
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Electronic Defence Systems Fax +46 8 580 322 44
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The BOH pod provides for future growth
in terms of aircraft interface using MIL-
STD-1553, RS485 data links and discrete
signals. Also, wireless technology can be
utilized. The pod can therefore interface to
virtually any display or control means.
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WE STRIVE TO ANTICIPATE TOMORROW.
• A Tool to Generate User Data Files, e.g.
dispensing program, can be used to adapt to
• A Data Loader tool can be provided to
upload to the pod User Data Files containing
e.g. dispense programs.
• A tool for Post-Mission Analysis, e.g. mission
flight route, inertial navigation data, threat
data, dispensing activities, can be used to
analyze recorded mission data.
• 3-in-1 Flight Line Tester, to stimulate MAW or
Doc id: P-300128 - eng. - ver. 2 - September 2012