India’s Defence Research and Development Organisation (DRDO) and Australia’s Defence Science and Technology Group (DSTG) have initiated a landmark three-year project focused on advanced towed array sensors aimed at enhancing undersea surveillance capabilities, critical for maritime security in the Indo-Pacific region. Signed on June 4, 2025, this collaboration underlines the strategic partnership within the Quad framework and aims to improve anti-submarine warfare efficiency through innovative techniques like Towed Array Target Motion Analysis (TATMA). This initiative not only strengthens bilateral defense ties but also positions both nations to reduce dependence on foreign technologies, fostering indigenous defense manufacturing and potentially tapping into a growing global sonar market, thereby reinforcing regional stability amidst increasing submarine activities.