"Thales Underwater Systems (TUS), formerly known as Thomson Marconi Sonar, is an international defence manufacturer specialising in sonar systems for submarines, surface warships, and aircraft as well as communications masts and systems for submarines. TUS is a subsidiary of Thales Naval, part of the Thales Group, and has sites in the United Kingdom, France, and Australia. TUS is made up of three subsidiary companies: TUS Ltd. in the UK, TUS SAS in France and TUS Pty."@en .