The U.S. Army has awarded Raytheon Company a $36 million contract to fund the certification and testing of a significant upgrade to the AN/ARC-231 Multi-Mode Communications System, the Waltham, MA-based company announced August 12. The upgraded systems will provide the highest level of security for voice and data communications for more than 7,000 rotary, fixed wing and unmanned Army platforms – including Apaches, Blackhawks, Chinooks and Gray Eagles. The AN/ARC-231 is a VHF/UHF multi-band tactical communications system that provides high quality, reliable, secure, internationally compatible and interoperable voice and data links. The software-defined AN/ARC-231 is ready for a seamless transition to the emerging Mobile User Objective System (MUOS) satellite communications networking waveform, while retaining full compatibility with legacy air-to-air and air-to-ground Line of Sight and SATCOM communication requirements.