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AM 116 to 151.975
MHz. “Receive Only”
AM frequency range
108 to 115.975 MHz.
Same as VHF
FM-AM No. 1 radio.
Two-way voice
communication in
the frequency range
of 30 to 87.975 MHz.
Two-way
communication in
the frequency range
of 225 to 399.975
MHz.
Secure
communication for
pilot AN/ARC-186 or
AN/ARC-201 radio.
Within crew Pilot center
stations and console and
two external CPG right
receptacles. console
Not Pilot center
applicable console
Line of sight Pilot right
console
Line of sight CPG right
console
Line of sight Pilot right
console
Line of sight Pilot right
console
Not Pilot right
applicable console
Complete
provisions
3-2
TM 1-1520-233-10
Table 3-1. Communication/Navigation Equipment - continued
Control
Equipment Nomenclature use Range Location Remarks
(ADF) AN/ARN-89
C-7392/ARN-89
(ADF) AN/ARN-149 (V)
C-12192/ARN-149
(DNS) AN/ASN-128
Computer Display Unit CP-1252 CDU
(CDU)
Radio range and
broadcast reception.
Automatic direction
finding and homing
in the frequency
range of 100 to 3000
kHz.
Provides controls for
operation of
AN/ARN-89 ADF.
Provides relative
bearing to the
transmitting station
being received.
Includes standard
commercial
broadcast AM
stations and
nondirectional
beacon (NDB)
frequencies.
Operates in the
frequency range of
100 to 2199.500 kHz.
Provides controls for
operation of
AN/ARN-149 ADF.
Provides present
position or
destination
navigation
information in
latitude and
longitude (degrees
and minutes) or
Universal Transverse
Mercator (UTM)
coordinates.
Provides controls and
indicators for
operation of the
AN/ASN-128 DNS.
50 NM
Not
applicable
Line of sight
for
high-power
NDB, 15 to
20 NM for
low-power
NDB
Not
applicable
Not
applicable
Not
applicable
Pilot right
console
Pilot right
console
Pilot right
console
Pilot right
console
CPG right
console
CPG right
console
3-3
TM 1-1520-238-10
Table 3-1. Communication/Navigation Equipment - continued
Control
Equipment Nomenclature Use Range Location Remarks
(DNS) AN/ASN-137 Provides present Not CPG right
position or applicable console
destination
navigation
information in
latitude and
longitude (degrees
and minutes) or
(UTM) coordinates.
(CDU) IP-1552/G CDU Provides controls and Not CPG right
displays for applicable console
operation of the
AN/ASN-137 DNS.
(IFF) AN/APX 100(V) Transmits a specially Line of sight Pilot right
coded reply to a console
ground based IFF
radar interrogator
system.
Absolute Altimeter AN/APN-209 Measures absolute 0 to 1500 feet Pilot right
altitude. above ground instrument
level panel
(HARS) Senses helicopter Not Pilot right
attitude and motion applicable instrument
to define roll, pitch, panel
heading, and flight
path.
Data Transfer DR-902B Auto loading of Not CPG right
Receptacle (DTR) mission data applicable console
Embedded Global CN-1689(V)1/ASN Provides present Not CPG right
Positioning System position or applicable console
Inertial Navigation destination (CDU)
Unit (EGI) navigation
information in
latitude and
longitude (degrees
and minutes) or
(UTM) coordinates.
3-4 Change 3
TM 1-1520-238-10
Figure 3-1. Antenna Arrangement (Sheet 1 of 2)
Change 3 3-5
TM 1-1520-238-10
Figure 3-1. Antenna Arrangement (Sheet 2 of 2)
3-6
TM 1-1520-238-10
Section II. COMMUNICATIONS
3.5 INTERCOMMUNICATION SYSTEM (ICS)
C-1041401)3/ARC OR C-11746(V)4/ARC.
TWO ICS control panels, placarded CSC (fig 3-2 and
3-3), one each for pilot and CPG, provide intercommunication
capability between crewmembers. These also
provide a means by which the pilot and CPG may select
and control associated radio equipment for voice transmission
and reception. Additionally, an external jack
fitting on each service panel, located outboard on each
wing, permits maintenance personnel to communicate
with the crewmembers. A radio transmit/interphone
rocker switch is installed on both cyclic stick grips (fig
2-26). A foot-operated radio transmit switch is installed
　
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