Hydroacoustic production The Australian company Thales Australia has opened a new production and service complex in Sydney for the development, production and maintenance of hydroacoustic systems (YES). The 100-meter production workshop will produce towed sonar stations for submarines, frigates and unmanned marine platforms. The facility will produce the S2087 towed sonar for the Hunter-class frigates under construction, as well as support for the sonar systems of the Collins-class submarines, which remain the backbone of Australia's submarine force.