HII, Thales Demonstrate Autonomous Mine Countermeasures

The end-to-end demonstration links detection, classification and neutralization of sea mines in one automated mission chain.

Updated on Nov. 3, 2026 in Robotics

Bold flat-color editorial illustration of a single unmanned underwater vehicle beneath a dark teal ocean surface, with a pale cyan sonar fan spreading through the water. — HII and Thales demonstrated an end-to-end autonomous mine countermeasure system on November 3, 2026, linking detection, classification and neutralization in one automated chain. AI Illustration. Upload story photo >

HII and Thales have demonstrated an end-to-end autonomous mine countermeasure capability that integrates unmanned underwater vehicles, sonar and underwater effectors into a single operational workflow. The announcement was dated Pocasset, Mass., on November 3, 2026.

Why it matters

Mine countermeasures have traditionally required separate platforms and manual coordination, and combining detection, classification and neutralization into one automated chain points to a more streamlined approach for naval operations. The integration is built on an open, modular architecture compliant with a NATO mission environment.

The REMUS 620 is a next-generation medium-class unmanned underwater vehicle built for long-range, multi-day operations, paired with Thales' SAMDIS 600 multi-aspect sonar and ANGLER underwater effector. The demonstration used automated launch and recovery via HII's Sea Launcher system, but performance metrics for the chain were not disclosed.

The players

HII (Huntington Ingalls Industries)

A major U.S. defense shipbuilder and naval technology contractor headquartered in Virginia, which builds the REMUS 620 unmanned underwater vehicle used in the demonstration.

Thales

A French multinational defense and aerospace electronics company with roughly 85,000 employees in 65 countries, which supplied the PathMaster architecture, sonar and effector systems.

The details

The demonstration ran on Thales' Expeditionary PathMaster open architecture, with mission management and sonar analysis software hosted on Thales' Expeditionary Portable Operation Center. Detected contacts were analyzed using AI-enabled automatic target recognition, and the ANGLER effector and a remotely operated vehicle completed neutralization of identified mines.

2025: Thales and HII integrated and field-exercised SAMDIS 600 sonar aboard the REMUS 620, setting up this demonstration.
November 3, 2026: HII and Thales announced the end-to-end autonomous mine countermeasure demonstration.

The Tech Race

This demonstration extends the 2025 integration of Thales' SAMDIS 600 sonar aboard HII's REMUS 620, moving from a sensor-platform pairing to a full mission workflow. It positions both companies in the competitive effort to automate naval mine countermeasures, a capability traditionally handled by separate manned and unmanned systems.

For most readers the demonstration does not change buying or daily use, but it signals how autonomous undersea systems may be deployed for maritime safety work. The source does not indicate timelines for fielding or public availability of the technology.

The takeaway

Automating the full detect-to-neutralize chain for underwater mines reduces the number of separate platforms and manual handoffs involved. Watch for follow-on announcements on fielding schedules, which the source does not yet provide.