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suppresses hot exhaust gases (see Figure G-1).
(2) UH-60 aircraft survivability equipment suite capabilities. The UH-60 ASE suite provides for PW radar
and decoying for radar directed threats. Additionally the ASE suite provides omnidirectional IR jamming
for IR directed threats. The aircraft signature reduction capabilities include both nonreflective IR absorbing
paint and HIRSS, which suppresses hot exhaust gases (see Figure G-1).
(3) CH-47 aircraft survivability equipment suite capabilities. The CH-47 ASE suite provides for PW radar
signal detection for radar directed threats. Additionally the ASE suite provides omnidirectional IR decoying
for IR directed threats. The aircraft signature reduction capability consists of nonreflective IR absorbing
paint only (see Figure G-2).
FM 1-113 Appendix G
G-4
Figure G-1. EH-60 and UH-60 ASE suites
Figure G-2. CH-47 ASE suite
c. Situational Awareness. All cargo and utility aircraft are equipped with PW RSDS (such as AN/APR-39(V)1,
AN/APR-39(V)2, or AN/APR-39A(V)1), which provide the aircrew with alerts of radar activity. Aircrews use the
cues from the RSDS to change modes of flight (contour to NOE) or to increase vigilance by actively seeking
terrain features for masking. EH-60 aircraft also detect the presence of CW radar through the use of the
AN/ALQ-162 continuous wave radar jammer.
d. Active Countermeasures. ASE countermeasures assist the aircrew in buying time when masking terrain is not
readily available, and the aircraft must maneuver to masking terrain or move outside the threat range. IR threats
can be jammed by AN/ALQ-144A(V)1 or through the combined use of the AN/ALQ-156(V)2/3 and the flare
equipped M-130 general purpose dispenser. Radar threats can be decoyed by use of the M-130 with chaff. CW
radar can be jammed by the AN/ALQ-162(V)1.
e. Radar Warning Receivers.
(1) AN/APR-39(V)1 radar signal detecting set. The AN/APR-39(V)1 RSDS is the basic version of RSDS,
which uses a signal comparator, signal intensity strobe display, and audio cues to provide detection of PW
radar. It provides coverage for C/D and E through J band PW radar. The system has the capability of
detecting all pulse radars normally associated with hostile SAM, airborne intercepts, or antiaircraft
weapons. Indications require direct aircrew interpretation since this system has no EID software.
(2) AN/APR-39(V)2 radar signal detecting set. The AN/APR-39(V)2 RSDS is a special version of RSDS,
which uses a digital processor and alphanumeric display to provide detection of PW radar for special
electronic mission aircraft. It provides coverage for C/D and E through J band pulsed wave radar. The
system has the capability of detecting all pulse radars normally associated with hostile SAM, airborne
intercepts, or antiaircraft weapons. The EID software is reprogrammable and must be specific theater
selected before flight.
(3) AN/APR-39A(V)1 radar signal detecting set. The AN/APR-39A(V)1 RSDS is an upgraded version of
the AN/APR-39(V)1, which uses a digital processor, alphanumeric symbology display, and synthetic voice
FM 1-113 Appendix G
G-5
warning to alert the aircrew to the presence of radar directed air defense threat systems. It provides
coverage for C/D and E through M band PW radar. The theater specific EID software is reprogrammable.
f. AN/ALQ-144A(V)1 Countermeasure Set. This CMS is an active, continuously operating omnidirectional, IR
jammer system for helicopters, designed to confuse or decoy threat IR missile systems. The AN/ALQ-144A(V)
CMS is designed to provide jamming of all known threat IR missile systems, and it must be operated on an
aircraft equipped with low reflective paint and engine exhaust suppressers. The system has specific jam program
number settings that must be set prior to flight (see Figure G-3).
g. AN/ALQ-162(V)2 Countermeasure Set. This CMS provides warning and protection against SAM and airborne
intercept missiles using CW illuminator radar for guidance. The CW signals detected by the system will be
validated, and jamming initiated, in conjunction with threat identification given to the aircrew. The specific action
taken by the system is determined by warning and jamming thresholds programmed into the system. The system
has specific jam settings that must be set prior to flight.
h. AN/ALQ-156(V)1/2 Countermeasure Set. This CMS is an airborne radar system that provides protection to the
aircraft by detecting the approach of antiaircraft missiles. Upon detection, the missile detector automatically
initiates a signal that triggers the M-130 general dispenser system. The dispenser system releases a flare to decoy
an IR seeking missile away from the aircraft.
Legend: See the glossary for acronyms and abbreviations.
　
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