Thales Australia has signed a contract with the Australian Defence Materiel Organisation to upgrade the Scylla (TSM 2233) sonar systems on the Royal Australian Navy's Collins-class submarines. The upgrade, announced on 14 November, will address obsolescence issues on the Scylla active and passive bow array sonars by replacing software and installing commercial off-the-shelf processing boards and provide power savings and weight savings of more than 1 tonne, Thales said. The update will be installed on the Collins-class submarines from 2014.
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