RADIOS SURVIVAL  ( PERSONAL LOCATOR BEACONS )
                          PRC-112D  Personal Locator Beacon


The AN/PRC-112 survival radio provides Army Search and Rescue (SAR) personnel with the capability to perform combat search and rescue (CSAR) missions of downed aircrew personnel. The Survival Radio is critical to minimizing the exposure of not only downed aircrew personnel but also the personnel and equipment of forces conducting the CSAR.

The AN/PRC-112 radio is a multi-mission transceiver used in conjunction with the AN/ARS-6 Personnel Locator Radio Set, and the KY-913 Program Loader to make up the Army Personnel Location System (PLS). The AN/PRC-112 acts as a transponder, supplying ranging and personnel identification to the AN/ARS-6 system. Additionally, it performs beacon and air-to-ground voice functions. A user's location can be accurately determined when used in combination with an interrogator equipped aircraft for rescue/extraction.

The unit can be stowed onLPU- 17/P, LPU-18/P, LPU-20/P Life Preservers ,SRU-21/P  and CMU-33/PSurvival Vests .

The AN/PRC-112 radio is a multi-mission transceiver used in conjunction with the AN/ARS-6 Personnel Locator Radio Set, and the KY-913 Program Loader to make up the Army Personnel Location System (PLS). The AN/PRC-112 acts as a transponder, supplying ranging and personnel identification to the AN/ARS-6 system. Additionally, it performs beacon and air-to-ground voice functions. A user's location can be accurately determined when used in combination with an interrogator equipped aircraft for rescue/extraction.

The AN/PRC-112 currently contains 11 internal modules, of which three critical modules can no longer be manufactured. Due to the obsolescence of these critical modules CECOM has obtained funding to enable a redesign effort to upgrade the radio to state of the art technology. As part of this effort, the radio will incorporate acceptance capability for any power source (including rechargeable/commercial batteries), reduce power consumption, and incorporate indicators for low power and operational status. There are also options built into the contract, to include a Global Positioning Satellite (GPS) tagger capability, a Search and Rescue Satellite Aided Tracking (SARSAT) capability and over the horizon capability.

The AN/PRC-112D Survival Radio provides the most cost effective way of dealing with growing obsolescence, while adopting the most reliable and advanced solution available and reducing total cost of ownership. This state-of-the-art upgrade with programmable software results in reduced logistics costs, increased product reliability, and increases mission readiness.

Operation modes:
Frequency Range: 121.5 MHz

225 MHz to 299.975 MHz
Available channels: 3000 in 25 kHz steps
Frequency stability: + 5ppm
Modulation modes: AM voice

AM swept-tone beacon:121.5 MHz and 243 MHz

DME transpond: any UHF channel
Voice Channel

Swept-tone beacon: 121.5 MHz and 243 MHz

DME transpond: any UHF channel
Dimensions: 7.69 in. high x 3 in. wide x 1.5 in. deep
Weight: 28 ounces with battery
Volume: 28 cubic inches
Ancillary Equipment: Rechargeable batteries (upgraded version)

Non-rechargeable batteries

External Power Adapter
Maintenance Concept: Repair at AVUM is limited to replacement of nonrepairable items such as batteries, knobs, earphone, antenna, pins and textile bag.

All other repairs are done by the Depot including replacement of nonrepairable modules and assemblies.
                                    PRC-112 Program Loader


The AN/PRC-112 survival radio provides Army Search and Rescue (SAR) personnel with the capability to perform combat search and rescue (CSAR) missions of downed aircrew personnel. The Survival Radio is critical to minimizing the exposure of not only downed aircrew personnel but also the personnel and equipment of forces conducting the CSAR.

The AN/PRC-112 radio is a multi-mission transceiver used in conjunction with the AN/ARS-6 Personnel Locator Radio Set, and the KY-913 Program Loader to make up the Army Personnel Location System (PLS). The AN/PRC-112 acts as a transponder, supplying ranging and personnel identification to the AN/ARS-6 system. Additionally, it performs beacon and air-to-ground voice functions. A user's location can be accurately determined when used in combination with an interrogator equipped aircraft for rescue/extraction .

AN/URT-45  PLB / ELT

Ejection Seat & Life Raft Emergency PLB  406 MHz GPS . Compact, military grade emergency beacon providing tri-band operation with GPS. Easy to install: designed for use in Martin-Baker ejection seat packs, Life Rafts and military parachutes. Rugged: withstands demanding conditions. Easy to use: manual and automatic activation. Accurate to better than 100 meters within one minute of activation. Reliable: built in self-test. Optional remote programming/toggle switch cable assembly (USB 2.0 compatible)

 

The AN/URT-45  PLB is designed for use on Martin Baker ejection seat packs, helicopter rescue kits, military type back style parachutes and life rafts.  The ELT is a first alert device used to signal to SAR teams that an aircrew member has either ejected or bailed out of an aircraft.

 

In the Martin-Baker ejection seat scenarios, the ELT is packed in the survival kit in the seat pan.  When a pilot ejects at altitude, the pilot remains in the seat until his altitude is below 10,000 feet. Upon seat separation, the parachute is deployed, and the survival pack drops below the pilot.  When the lid separates from the seat pan, the ELT is automatically activated on beacon mode .

 

In the backstyle military type parachutes operations, the AN/URT-45 is packed into the  backstyle parachute pack while the ELT selector knob is set to the AUTO position.  When the parachute deploys, the Automatic Activation Lanyard is pulled from the ELT activating the beacon.

 

In both the ejection seat and parachute operations, once the pilot is on the ground the pilot removes the External Transmitter Antenna, and the External GPS Antenna.  The pilot then deploys the Internal Transmitter Antenna, and ensures that the Internal GPS Antenna can 'see the sky'.

 

The A/URT-45 can also be manually activated by a user.  The user interface is intuitive and easy to use, no matter the condition of the survivor.  The AN/URT-45 can be used equally well with either the right or left hand, with controls large enough to be operated while wearing gloves. 

 

Activating the beacon is simple and can be done with one hand.  For activation, the survivor turns the Function Switch to the ON position, which immediately activates the beacon.  Visual indications of both beacon activation and GPS fix are provided.  The beacon can be switched off by the rescue crew after the survivors have been rescued or by the survivors if multiple beacons are active.  A beacon that has been turned off can be reactivated by turning the Function Switch to the ON position.  The safety lanyard can be attached to the user's equipment to ensure that the beacon is not lost or otherwise separated from the person in distress.

 

The AN/URT-45 provides world-wide alerting in emergency situations via a network of satellites of the Cospas-Sarsat distress alerting system.  This system enables the location, nationality, unit serial number, and user specific registration data of the personal locator beacon to be immediately identified with the receipt of the alert.

PRC-90-2  PLB
                        PRC-90-2 Personal Locator Radio Beacon

Despite discontinued production we still have a few PRC-90-2 available for sale in excellent condition.

This is a survival radio that is carried in the emergency vest of air crew members. It can transmit a beacon (attention getting warble tone) on 243.0 MHz.  Voice on 243.0 or 282.8 MHz and Morse Code in Modulated Continuos Wave (MCW) mode on 243.0.  It will receive voice on 243.0 and 282.8 MHz.  The previous frequencies are for Military emergency communications.  The PRC-90 does not work on the civilian emergency frequency of 121.5 MHz nor does it work on the international distress frequency of 406.025 MHz.


The unit can be stowed onLPU- 17/P, LPU-18/P, LPU-20/P Life Preservers ,SRU-21/P  and CMU-33/PSurvival Vests .

Note: Aircraft radios use AM so that when two transmissions double both transmissions are heard.  This is unlike FM where if one station is stronger than the other (by about 3 dB) the capture effect eliminates the weaker signal and it is not heard.  Since an AM receive will not have an audible output when a pure CW signal is being received, a Modulated CW signal is used and the AM receiver outputs the modulation frequency.

The AN/PRC-90 radio set is a dual channel transmitter/receiver capable of transmitting
 up to 60 nm (line of sight, depending on receiving aircraft's altitude).  It operates on guard (243.0) or SAR primary operating frequency (282.8) with a mode for swept tone signal on 243.0 only.  Transmission of beacon or code can be up to 70 nm.  Average battery life is about 14 hours.Radio is equipped with external earphone jacks to assist pilot in hearing radio transmission with helmet on."

We have few units available for sale with new MIL batteries .
SARBE 7 & McMurdo PLB's
SARBE 7 PLB

When activated by the release cord, the SARBE 7 PLB transmits on
121.5 and 243 MHz a beacon signal (no voice capability )


The unit can be stowed onLPU- 17/P, LPU-18/P, LPU-20/P
Life Preservers ,SRU-21/P  and CMU-33/PSurvival Vests .


Transmissions on these frequencies will be detected by military aircraft
operating within line of sight of the PLB
(assuming the aircraft have TR+G selected).

In particular, SAR helicopters are able tohome on SARBE 7
transmissions. Furthermore, under European and ICAO guidelines,
civilian commercial aircraft are obliged to monitor 121.5 MHz.
In addition to airborne monitoring, the Distress and Diversion (D&D)
Cells at Prestwick and Swanwick employ a total of 21 terrestrial
receiver sites throughout Scotland, England and Wales to
auto-triangulate on transmissions receivedon both 121.5 and
243 MHz.

Although these receivers are mainly for aircraft in flight,
transmissions from PLBs at ground level in the receiver sites’ vicinity
maybe detected directly. Many airfields also monitor these
aeronautical distress frequencies.
( we have only few units available for sale )
URT-44  PLB

The   AN/URT-44   PLB  integrates   the   capabilities   of   the  

AN/URT-33,  which  transmitted  the  older  style  emergency 

location beacon at 243 MHz, along with new features which

added  the  ability  to  transmit  a  second  homing  signal  at 

121.5 MHz and the newer digital formatted distress message

at    406.037    MHz    frequency    to    the    Cospas-Sarsat

transponder    equipped    satellites.    This    digital    message   

includes  GPS geolocation  with  an  accuracy  better  than  26 

meters  (82  feet),  thus  greatly  improving  personnel  location 

reliability, speed of rescue and level of confidence.

 

The  121.5  and  243 MHz  transmissions  of  the  AN/URT-44 

provide  approaching  SAR  forces  with  a  beacon  for  their 

direction  finding  equipment.  The  primary  advantage  of  a 

406.037 MHz  beacon  over  a  121.5  and  243 MHz  beacon, 

when  used  in  conjunction  with  the  Cospas-Sarsat  satellite 

system,  is  to  provide  initial  SAR  forces  with  the  transmitter 

location.  Thus,  the  beacon’s  location  is  computed  by  the 

Cospas-Sarsat  system  based  on  the  Doppler  shift  between 

the 406.037 MHz beacon and the satellite orbital motion or

the embedded GPS position when  acquired by the beacon.

 

The  AN/URT-44  uses  an  enhanced  multi-moded  waveform 

compatible  with  STANAG  7007,  which  facilitates  location 

and  detection  during  search  and  rescue  operations.  The 

device was qualified by Cospas-S arsat authorities for military

use at Class 2 standard