Software Radio Technology Plc, together with its subsidiaries, develops and supplies automatic identification system based maritime domain awareness technologies, derivative products, and system solutions in North America, the United Kingdom, rest of Europe, and internationally. Its automatic identification system is a mesh network communications system technology, which uses a combination of GPS and VHF radio to enable real time, simultaneous data communication between multiple, independent entities providing information, such as identity, position, course, and speed. The company also provides module and OEM product and display technology solutions to marine electronics brand owner; vessel transceivers in small quantities to marine electronics dealers; and turn-key marine domain system solutions for vessel tracking, infrastructure security, and waterway management. In addition, it is involved in the electronic hardware and software engineering, and distribution of marine tracking equipment; processing of real time maritime domain data and traffic movements into interactive 3D display presentation; and ownership of a suite of Tetra communications handset technology. The companys solutions are used in a range of maritime applications from safety and security to fishery management and environment protection. Software Radio Technology Plc was founded in 1987 and is based in Bath, the United Kingdom.