S WISE Debuts AI-Enabled Underwater Loitering Munition at DSEI 2025

At DSEI 2025 in London, South Korean company S WISE unveiled a next-generation underwater loitering munition system designed for autonomous missions in contested maritime environments. Equipped with onboard artificial intelligence (AI) and advanced sensors for target recognition and classification, the system represents a significant evolution in unmanned undersea warfare capabilities.

System Overview and Capabilities

The unnamed underwater loitering munition—developed by S WISE (Smart Weapon & Intelligent System Engineering)—is a compact autonomous underwater vehicle (AUV) optimized for ISR (intelligence, surveillance, reconnaissance), mine countermeasure support, and precision strike roles. According to company representatives at DSEI 2025, the system is designed to patrol pre-defined areas autonomously for extended periods before engaging designated targets based on onboard classification algorithms.

Key features include:

Autonomous navigation: GPS-denied inertial navigation with terrain reference mapping
Target recognition: Onboard AI-based computer vision for object detection and classification
Low acoustic signature: Designed for stealthy operation in littoral or contested waters
Payload options: Configurable warhead or sensor suite depending on mission profile

The system is reportedly capable of operating at depths exceeding 100 meters and has an endurance of up to several hours depending on speed and payload configuration. The vehicle can be launched from surface vessels or submarines via torpedo tubes or dedicated launch canisters.

AI-Driven Target Discrimination

A standout feature of the S WISE system is its use of onboard artificial intelligence to identify and classify targets without requiring real-time human input. The company claims its proprietary neural network models have been trained on extensive datasets including naval vessel signatures, seabed clutter profiles, and mine-like object libraries.

This capability allows the munition to autonomously differentiate between legitimate military targets—such as enemy submarines or unmanned undersea vehicles—and non-targets like marine life or civilian infrastructure. Once a target is confirmed within rules of engagement parameters preloaded into the system’s mission plan, it can initiate an attack using its integral warhead.

This level of autonomy raises both operational advantages and ethical questions. While it reduces operator workload and latency in high-threat environments such as chokepoints or denied areas (e.g., South China Sea), it also challenges existing doctrines around man-in-the-loop control for lethal autonomous systems.

Tactical Applications in Modern Naval Warfare

The emergence of underwater loitering munitions aligns with broader trends toward distributed maritime operations and asymmetric naval tactics. Compared to traditional torpedoes—which are typically fire-and-forget—the S WISE solution offers persistent presence combined with selective engagement capability.

Plausible mission sets include:

Denying access to strategic straits or port approaches
Shadowing high-value units like aircraft carriers or SSBNs
Hunting enemy UUVs or seabed infrastructure (e.g., undersea cables)
MCM support by identifying decoys vs actual mines before engaging

This flexibility makes it attractive not only for blue-water navies but also for smaller regional forces seeking cost-effective deterrence tools against larger adversaries. The ability to deploy these munitions from multiple platforms—including unmanned surface vessels (USVs)—further enhances their utility in multi-domain operations.

S WISE’s Growing Role in Undersea Autonomy

S WISE has steadily expanded its portfolio since its founding as a spin-off from South Korea’s Agency for Defense Development (ADD). Known previously for smart torpedo decoys and sonar processing modules, the company has pivoted toward modular AUV platforms with embedded autonomy over the past five years.

The underwater loitering munition showcased at DSEI builds upon earlier prototypes tested under Korea’s Defense Innovation Unit programs. According to public R&D disclosures from ADD between 2021–2024, several test events were conducted off Jeju Island involving AI-enabled subsea drones capable of obstacle avoidance and simulated strike behavior against dummy targets.

S WISE is reportedly collaborating with Hanwha Ocean (formerly DSME) on integration pathways into Republic of Korea Navy platforms such as KSS-III submarines. Export discussions are also underway with Southeast Asian navies interested in littoral denial capabilities without escalating force posture overtly.

Challenges Ahead: Rules of Engagement and Interoperability

Despite its promise, fielding autonomous lethal systems below the waves presents regulatory hurdles. NATO STANAGs governing UUV interoperability remain limited compared to air domain equivalents like Link-16. Moreover, national policies vary widely on whether fully autonomous weapons are permissible under international humanitarian law frameworks such as Article 36 reviews under Additional Protocol I of the Geneva Conventions.

S WISE officials emphasized that their system includes multiple fail-safes including abort-on-command links via acoustic modems when within range—and that all lethal actions must be pre-authorized within strict mission parameters uploaded prior to launch. However, verification mechanisms remain opaque pending further trials with end users.

If adopted more broadly by allied navies or integrated into multinational exercises such as RIMPAC or IMDEX Asia demos in coming years, standardization efforts will likely accelerate alongside doctrinal updates on human-machine teaming below the surface domain.

Outlook: Toward Persistent Subsea Presence

The unveiling of this underwater loitering munition underscores growing interest in persistent subsea presence through intelligent unmanned systems—a domain historically dominated by passive sensors or expensive crewed assets. By combining ISR functionality with selective kinetic capability in one platform, S WISE may have carved out a niche segment poised for rapid growth amid rising tensions over maritime chokepoints worldwide.

If successfully integrated into naval concepts like distributed lethality or mosaic warfare architectures—as championed by USN’s Unmanned Task Force—the technology could reshape how future conflicts unfold beneath the surface layer where attribution is murky but stakes are high.