SINCGARS

SINCGARS

SINCGARS (Single Channel Ground and Airborne Radio System) is a Combat Net Radio (CNR) currently used by U.S. and allied military forces. The radios, which handle voice and data communications, are designed to be reliable, secure and easily maintained. Vehicle-mount, backpack, airborne, and handheld form factors are available.

SINCGARS uses 25 kHz channels in the VHF FM band, from 30 to 87.975 MHz. It has single-frequency and frequency hopping modes. The frequency-hopping mode has a slow hop rate (on the order of 100 Hz), which is well within the ECM capabilities of modern follow-on jammers, so it no longer provides anti-jam security against technologically advanced adversaries.Fact|date=May 2007

To operate in frequency hop mode, a SINCGARS radio requires a transmission security key (TSK), a pregenerated frequency list (Hopset), and accurate time of day. Keys and Hopsets are loaded using a fill device. The time of day is usually supplied from a Global Positioning System receiver. SINCGARS users maintain communications security (COMSEC) through VINSON encryption technology. Early SINCGARS radios required an external encryptor such as the KY-57; modern versions have embedded COMSEC. Secure audio transmitted by SINCGARS radios is digitized and compressed with 16 Kbit/s CVSD. A separate traffic encryption key (TEK) is required for encryption. Over the air rekeying (OTAR) is available, however a master key encryption key (KEK) must be manually loaded beforehand. Two radios can be connected together to serve as a communications relay.

The SINCGARS family has mostly replaced the Vietnam-war-era synthesized single frequency radios (AN/PRC-77 and AN/VRC-12), although it can work with them. An aircraft radio SINCGARS is phasing out the older tactical air-to-ground radios (AN/ARC-114 and AN/ARC-131).

Over 250,000 SINCGARS radios have been purchased. There have been several system improvement programs, including the ICOM version, which has integrated voice encryption, and the ASIP version, which is less than half the size and weight of the ICOM-SIP version. In 1992, the U.S. Air Force awarded a contract to replace the AN/ARC-188 for communications between Air Force aircraft and Army units. SINCGARS is expected to be replaced starting in 2008 with the Joint Tactical Radio System (JTRS), a software-defined radio that will work with SINCGARS, HAVE QUICK and other existing radios.

Timeline

*November 1983: ITT wins the contract for the first type of radio, for ground troops.
*May 1985: ITT wins the contract for the airborne SINCGARS.
*July 1988: General Dynamics wins a second-source contract for the ground radio.
*April 1989: ITT reaches "Milestone IIIB": full-rate production.
*December 1990: 1st Division is equipped.
*December 1991: General Dynamics wins the "Option 1 Award" for the ground radio.
*March 1992: ITT wins a "Ground and Airborne" award.
*July 1992: Magnavox Electronics Systems Company develops the airborne SINCGARS AN/ARC-222 for Air Force
*August 1993: General Dynamics achieves full rate production.
*April 1994: ITT and General Dynamics compete for the ground radio.
*May 1994: ITT wins a sole-source contract for the airborne radio.

Models

*RT-1523
*RT-1523A
*RT-1523B
*RT-1523C
*RT-1523D
*RT-1523E
*RT-1523F

*RT-1730C
*RT-1730E

*RT-1702F Export Version

Unit Replacement Cost: $6,500.

External links

* [http://www.fas.org/man/dod-101/sys/land/sincgars.htm www.fas.org: SINGLE CHANNEL GROUND and AIRBORNE RADIO SYSTEM (SINCGARS)]
* [http://www.monmouth.army.mil/prjbk97/index.html www.monmouth.army.mil: FISCAL YEAR 1997 COMMAND, CONTROL, COMMUNICATIONS, COMPUTERS, INTELLIGENCE, ELECTRONIC WARFARE AND SENSORS (C4IEWS) PROJECT BOOK]
* [http://www.forecastinternational.com/archive/dc/dc1879.doc www.forecastinternational.com: Magnavox and ARC-222]
* [http://www.globalsecurity.org/military/systems/aircraft/systems/an-arc-222.htm www.globalsecurity.org] - NOTE development contractor for the ARC-222 was Magnavox in Fort Wayne, Indiana, not Raytheon as stated. See link above)


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