SRT Marine Systems plc, formerly Software Radio Technology plc, is engaged in the marine technology business. The Company's principal activity includes development and supply of automatic identification system (AIS)-based maritime domain awareness technologies, and derivative product and system solutions for use in a range of maritime applications from safety and security to fishery management and environment protection. AIS is a mesh network radio communications system technology specifically designed for the marine domain, and it uses a combination of global positioning system (GPS) and high frequency radio to enable real time, simultaneous data communication between multiple, independent entities providing information, such as identity, GPS position, speed and other customized data. It offers a range of AIS products and maritime domain monitoring system solutions, which also fuse other maritime sensor technologies, such as radar, closed-circuit television and communications.