CSEL AN/PRQ-7 Handheld Radio
Combat Survival Evader Locator (CSEL) AN/PRQ-7 Handheld Radio (HHR). The HHR physical characteristics include an earphone jack, speaker-microphone, keypad, volume control, push-to-talk button, Light Emitting Diode, and Liquid Crystal Display.
Today in WW II: 21 Jan 1942 Rommel's second offensive drives the British 8th Army back almost 300 miles, halting on 4 Feb between Gazala and Bir Hacheim, 30 miles west of Tobruk, Libya.
Combat Survival Evader Locator (CSEL) AN/PRQ-7 Handheld Radio (HHR)
Combat Survival Evader Locator (CSEL) AN/PRQ-7 Handheld Radio (HHR) combines the functions of several other devices in one compact package.
The Combat Survival Evader Locator (CSEL) AN/PRQ-7 Hand-held Radio Set (HHR) provides multiple communication options for the Search and Rescue (SAR) mission:
- Limited data communication for all Over-the-Horizon (OTH) modes
- SAR aircraft-compatible Line-of-Sight (LOS) voice communication
- COSPAS-SARSAT 406 megahertz beacon
- Precise geopositioning to the user
The CSEL AN/PRQ-7 is a fit, form, and function replacement for the survival radios AN/PRC-90 and AN/PRC-112.
The AN/PRQ-7 HHR is designed for one-handed operation, right or left, even with flight gloves or modified winter gloves. Once the HHR is activated, it may be polled by the CSEL ground segment Joint Search & Rescue Center (JSRC) Workstation without further action.
The HHR is loaded with mission data by inserting it into the Radio Set Adapter (RSA). The HHR is classified to the level of the waypoints entered, as these are the only items retrievable by an operator.
CSEL AN/PRQ-7 Handheld Radio (HHR) Characteristics
The multi-function Multi-Band/Broadband (VHF/UHF) AN/PRQ-7 HHR provides voice and secure data channels:
- 6 Programmable UHF Voice, SATCOM
- 4 Fixed LOS UHF Frequencies
- 1 SARSAT Unsecured Data Frequency
- 23 pre-formatted messages, 8 Navy, 1 Custom
The radio is software defined and can be field reprogrammed.
The CSEL AN/PRQ-7 HHR dimensions are 7.8 inches high, 3.2 inches wide, and 1.6 inches deep and it weighs only 31.8 oz. It will withstand the shock, vibration, and G-force of pilot emergency egress, and fits into the standard survival vest pocket, rucksacks, and ejection seat packs. It can be submerged in 10 meters of salt water for 5 minutes (or 1 meter for 12 hrs.), and operates in the -20 to +55 C° temperature range. The CSEL AN/PRQ-7 HHR has an estimated MTBF of 6100 Hours and an estimated Mean-Time-To-Repair at the Depot of 4 hours.
CSEL AN/PRQ-7 HHR Batteries
The main power source of the CSEL AN/PRQ-7 HHR is a Lithium Sulfur Dioxide battery with a life expectancy of 19 days at 25° Celsius. The LiSO2 battery pack was selected for the CSEL program because it provides longer battery life over a wider temperature range than conventional alkaline batteries.
Most of the HHR’s 32-ounce weight is the battery, attached to the base of the radio case. Power saving features and operation above 25° Celsius will extend the life of the battery. Both rechargeable and non-rechargeable batteries are supplied for the CSEL AN/PRQ-7 Handheld Radio. The battery survives in -20 degrees Centigrade temperatures and is water submersible. It has a life of about 10 days, sufficient for most anticipated missions. The rechargeable battery was developed in response to concerns about the cost of batteries and the using services are procuring both types.
A CR1620 lithium coin-cell backup battery retains the memory of the AN/PRQ-7 HHR when the main battery pack is removed.
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