Sonar Systems Market: How Defense Priorities Shape Platform and Technology Choices

The Sonar Systems Market is closely tied to how navies and commercial operators detect, locate, and recognize objects underwater. A sonar system uses sound waves to do this, sending acoustic signals and analyzing their reflections to learn the position and other properties of a target. According to Polaris Market Research, the market was valued at USD 4.85 billion in 2025, with a 2026 estimate of USD 5.21 billion, and is projected to reach USD 9.35 billion by 2034 at a CAGR of 7.58% from 2026 to 2034. Rising defense expenditure and growing demand for underwater surveillance and anti-submarine warfare are among the key factors shaping the landscape.

Defense Spending and Naval Modernization

Higher defense expenditure is supporting the procurement and modernization of naval platforms, as governments improve their capability in submarine tracking and underwater surveillance. Sonar enables naval forces to identify and locate underwater objects, and buyers increasingly expect advanced detection, signal processing, and operation across varied underwater environments. In August 2026, India’s Defence Research and Development Organisation highlighted indigenous sonar systems deployed aboard recently commissioned naval ships. The defense segment held the largest share by application at 68.00% in 2025, and naval forces accounted for 46.00% by end user. North America led regionally with a 33.0% share in 2025, owing to substantial defense investments and advanced technological capabilities.

Hull-Mounted Sonar and Ship Platforms

By product, hull-mounted sonar led with a 44.50% share in 2025, owing to the capability of hull-mounted sensors to enhance maritime security by detecting underwater mines and submarines. Installed directly on the vessel, it provides continuous acoustic surveillance without additional equipment, and fleet modernization and replacement of older systems support demand. By platform, ships held the largest share at 46.0%, reflecting a vast surface fleet and the fitting of sonar into both newbuilds and existing vessels.

Passive, Dual-Mode, and Sonobuoy Solutions

By technology, passive sonar held the largest share at 49.00% in 2025. It supports continuous acoustic monitoring over prolonged missions and works without the transmission phase that active systems require, while improved hydrophone sensitivity and advances in acoustic data processing help it perform in difficult underwater environments.

Dual-mode sonar is projected to grow at a 10.08% CAGR because it combines active and passive properties in a single system. Operators can switch modes by mission objective without additional equipment, and the design can simplify shipboard configuration where space and weight are limited.

Sonobuoys are anticipated to grow at a CAGR of 8.28%. They provide acoustic data from regions that ship-mounted devices may not reach, and because they can be dropped from an aircraft, operators can search larger areas and examine potential contacts remotely. Their use is tied to underwater surveillance and anti-submarine warfare operations, supported by more capable maritime patrol aircraft.

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https://www.polarismarketresearch.com/industry-analysis/sonar-system-market 

Competitive Landscape and Recent Developments

Key companies in the market include ASELSAN A.Ş., BAE Systems plc, Elbit Systems Ltd., FURUNO ELECTRIC CO., LTD., General Dynamics Corporation, Kongsberg Gruppen ASA, L3Harris Technologies, Inc., Leonardo S.p.A., Lockheed Martin Corporation, Northrop Grumman Corporation, RTX Corporation, Saab AB, Teledyne Technologies Incorporated, Thales Group, and TKMS ATLAS ELEKTRONIK GmbH. Competition is shaped by performance, reliability, compatibility, and the ability to deliver to operating requirements, with differentiation depending on acoustic sensors, signal processing, imaging, and system integration.

In August 2026, ELAC SONAR, a Cohort subsidiary, received a €140.7 million contract from Saab for integrated sonar systems, including active and passive sonar, for Poland’s Orka submarine program. In July 2026, Lockheed Martin announced an agreement to acquire Ultra Maritime for $3.45 billion, subject to closing conditions; Ultra Maritime’s products include sonobuoys, towed sonar arrays, and hull-mounted sonar systems.

Takeaways for Defense and Marine Buyers

Platform, technology, and installation decisions shape procurement. Buyers weighing sonar investments should match product type to mission length, platform size, and detection needs, while accounting for system costs, integration effort, and the structural and electrical changes older ships may need. Replacement of older sonar equipment is expected to remain a regular requirement across naval and commercial fleets.

Conclusion

The Sonar Systems Market is anticipated to witness steady expansion, supported by growing maritime security requirements and increasing investments in underwater surveillance technologies. Rising demand for advanced submarine detection, oceanographic research, and offshore exploration is encouraging sonar system deployment. Innovations in signal processing, artificial intelligence, and underwater sensor technologies are improving detection accuracy and operational efficiency. Additionally, the adoption of autonomous underwater vehicles is creating opportunities for compact and sophisticated sonar solutions. Defense modernization programs and commercial marine activities are expected to support sustained investment. Overall, the market is positioned for long-term development through technological advancements and expanding underwater monitoring applications.

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