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      Sonardyne upgrade for India’s national tsunami detection network

      Sonardyne upgrade for India’s national tsunami detection network

      A network of deep-water acoustic sensors that provides India’s coastal communities with an early warning of tsunami waves is being upgraded by marine technology company Sonardyne to extend both their endurance and capability.

      Deployed at key locations in the Bay of Bengal and the Arabian Sea, the network of Sonardyne’s Bottom Pressure Recorders (BPRs) is owned and operated by India’s National Institute of Ocean Technology (NIOT) as part of the country’s Tsunami Early Warning System (TEWS).

      The BPRs were first installed in 2007, as part of NIOT’s national tsunami detection system, which was conceived following the deadly Boxing Day Tsunami of 2004.

      The BPRs detect the characteristic changes in water pressure (as little as 1 cm in 4,000 m depth) caused by an earthquake in the deep ocean. If a tsunami wave is detected, an alert message is transmitted up to a satellite buoy on the surface. From there, it is relayed to the national Tsunami Warning Centre onshore for comparison with recent seismic activity. If validated, a widescale alarm is raised to alert vulnerable communities.

      Following a 10-year life refurbishment in 2017, the BPRs are now being upgraded to Sonardyne’s 6G hardware and Wideband 2 communications standard. The installation of low power electronics. new lower power consumption pressure sensors and doubled battery capacity of these maxi BPRs will significantly reduce maintenance visits and costs. Additionally, the acoustic telemetry signals used to transmit data to the surface will also now be fully digital, providing greater resilience to noise interference in the water column, as well as increasing bandwidth by ten-fold (from 600 bps to 6000 bps).

      The first batch of upgraded BPRs arrived in India in 2022, with further batches planned for shipment in 2023. In addition, Sonardyne are also supplying a large pool of spares to maintain a continuously available TEWS capability. These include floats and fittings for the larger Maxi BPRs being supplied, as well as transceivers for the surface buoys to communicate with the BPRs. NIOT are planning to use the upgraded capability to extend the number of permanently occupied stations.

      Each BPR is a customised version of Sonardyne’s Compatt transponder – a versatile subsea instrument that has a wide range of autonomous monitoring and measuring applications within offshore energy, survey and ocean science.

      Sonardyne’s BPRs benefit from being small and self-contained, with no cables, exterior sensors or batteries to interface, making them easy to deploy and more reliable. These features, alongside long battery life, reliable through-water communications and Sonardyne‘s expertise in long-endurance underwater monitoring applications, are the reasons why they were chosen for the Indian Ocean Tsunami Detection System back in 2007 and continue to protect their coastal communities 16 years later.

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      15 Jul
      15 Jul 2025, 12:30 – 15:30

      Defence Attaché Luncheon

      The Society of Maritime Industries will once again be hosting the overseas naval attachés & advisers based in London for a reception and buffet luncheon.
      03 Sep
      3 Sep 2025, 10:30 – 16:30

      SMI WWG Annual Seminar 2025

      SMI is delighted to announce the Annual Workboat Working Group (WWG) Seminar, bringing together stakeholders from across the UK’s workboat and coastal vessel community for a full day of expert...
      09 Sep
      9 Sep 2025 – 12 Sep 2025

      DSEI 2025

      Held at the easy to access ExCel exhibition centre every two years SMI has secured space in DSEI’s Naval Zone to support member companies.  The Naval Zone at DSEI is an interactive...
      16 Sep
      16 Sep 2025, 10:00 – 13:30

      Navigating the Future: Maritime Autonomy, Innovation & Opportunity

      MASG Council LISW Autonomy Event
      18 Sep
      18 Sep 2025, 10:00 – 16:00

      Global Maritime Connections Meet the Buyer

      The Department for Business and Trade (DBT), in partnership with the Society of Maritime Industries (SMI) and Seatrade Maritime, is pleased to present Global Maritime Connections, a high-impact Meet...
      21 Oct
      21 Oct 2025 – 24 Oct 2025

      KORMARINE 2025

      KORMARINE is the largest and most prestigious marine trade exhibition, fully supported by the world’s biggest Shipbuilders in Korea as well as leading international shipowners and offshore...
      04 Nov
      4 Nov 2025 – 6 Nov 2025

      Indo Pacific 2025

      Attracting industry professionals from around Australia, the region and the world, Indo Pacific 2025 will see key players from the maritime and naval defence communities come together for three days...
      07 Nov
      7 Nov 2025 – 10 Nov 2025

      Europort 2025

      Europort, organised in the world port city of Rotterdam, is the international maritime meeting place for innovative technology and complex shipbuilding. With an average of 25,000 professional...
      02 Dec
      2 Dec 2025 – 5 Dec 2025

      Marintec China 2025

      Launched for over 40 years, Marintec China has become renowned as one of the most authoritative B2B platform for the International Maritime Industry. The 2023 edition of this biennial event...
      25 Mar
      25 Mar 2026 – 27 Mar 2026

      Asia Pacific Maritime (APM) 2026

      APM (Asia Pacific Maritime) is the premier exhibition and conference in Asia showcasing a complete overview of the vessel sectors services and solutions, technology, vessel equipment, supplies, and...
      31 Mar
      31 Mar 2026 – 1 Apr 2026

      Ocean Connect Asia 2026

      Ocean Connect Asia presents a regional meeting point to bring together the converging worlds of autonomy, robotics and uncrewed based solutions for the ocean and coastal economies. As the...
      01 Jun
      1 Jun 2026 – 5 Jun 2026

      POSIDONIA 2026

      Posidonia brings the whole shipping world to its exhibitors. The international shipping community attends in strength with national pavilions and thousands of visitors.
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      1 Sep 2026 – 4 Sep 2026

      SMM 2026 (Shipbuilding, Machinery and Marine Technology trade fair)

      When it comes to meeting up with all the leading protagonists of the global maritime industry, there’s no place like SMM, one of the leading international maritime trade fairs. 
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      16 Mar 2027, 09:00 – 18 Mar 2027, 17:00

      Sea Asia 2027

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