IN Brief:
- HII and Thales reported a 3 November demonstration of an end-to-end mine-countermeasures workflow under the Expeditionary PathMaster architecture.
- REMUS 620 carried SAMDIS 600 sonar; Thales ePOC, mission software, and HII Odyssey coordinated detection and classification with ANGLER reacquisition and identification functions.
- The trial extends the companies' 2025 sonar integration work into a broader interoperable mission chain; no new customer order or confirmed live mine detonation was disclosed.
HII and Thales have demonstrated a coordinated naval mine-countermeasures workflow linking an autonomous underwater vehicle, synthetic aperture sonar, mission-management software and underwater identification equipment. Their 3 November 2026 trial brought HII’s REMUS 620 into Thales’ Expeditionary PathMaster architecture, extending an earlier sensor integration exercise to cover detection, classification, reacquisition and identification of mine-like objects within a connected mission sequence.
The exercise brought together equipment that would normally perform different functions and require their operators to exchange mission information. REMUS 620 searched the underwater environment using Thales’ SAMDIS 600 multi-aspect sonar, while command software coordinated the vehicle and passed the resulting information into an expeditionary operations centre. Thales’ ANGLER equipment then supported reacquisition and visual identification of mine-like objects at the final stage of the demonstrated sequence.
Thales’ Expeditionary PathMaster provided the common mission environment, using an open, modular architecture to connect vehicles, sensors, command systems and effectors. Its Expeditionary Portable Operation Center (ePOC) acted as the operational hub, hosting sonar analysis and mission-management applications alongside HII’s Odyssey Mission software. The arrangement linked vehicle movement and sensor results with information available to operators making identification and engagement decisions.
REMUS 620 is a medium-class uncrewed underwater vehicle designed for extended operations and configurable sensor payloads. The company identifies a modular open architecture that allows mission equipment to be changed according to the task. In mine-countermeasure work, the carrier must follow a planned search route while keeping the sonar in a suitable position to collect usable data. Vehicle speed, navigation accuracy, water conditions, and sensor settings all influence the quality and completeness of the survey.
Thales’ SAMDIS 600 uses multi-aspect synthetic aperture sonar to examine objects on or near the seabed. Synthetic aperture processing exploits the motion of the sonar platform and information collected over successive observations to produce detailed imagery. Inspecting potential targets from more than one aspect helps analysts assess their shape and distinguish objects that may appear similar from a single viewing direction. The data still has to be processed and interpreted in the context of seabed clutter, acoustic conditions, and the known characteristics of the area.
Contacts identified during the survey were processed through Thales’ sonar analysis software. High-resolution imagery and AI-enabled automatic target recognition assisted with classification and positioning of mine-like objects, allowing the mission team to determine which contacts required closer examination. The companies have not described automatic target recognition as independent authorisation for weapon release; the demonstration concerned the coordination of sensing, analysis and a subsequent remotely controlled identification stage.
HII’s Odyssey Mission contributed planning and command functions for the underwater vehicle, interfacing with the ePOC environment. Open interfaces are important because the search platform and the system deciding how to act on its information may be supplied by different manufacturers. Mission data must retain usable location references and contact identifiers as it passes from a vehicle’s control software into the analysis and command environment. A discrepancy in coordinate handling or contact association can make subsequent reacquisition considerably harder.
The final stage employed ANGLER, the underwater effector and remotely operated vehicle capability supplied through Advanced Acoustic Concepts, a Thales company. It reacquired the mine-like objects and provided visual identification, establishing the means to proceed towards an engagement or neutralisation decision. HII’s release does not state that a live explosive charge destroyed a mine during the demonstration, so the reported result is the integration of the complete mission workflow rather than a confirmed detonation.
Automated launch and recovery of REMUS 620 was also demonstrated using HII’s Sea Launcher. A host vessel must recover an underwater craft without damaging its equipment or creating avoidable risks for deck personnel, and automation can help standardise parts of that process. The companies did not provide sea-state limits or quantified reductions in turnaround time for the exercise; operational performance will depend on the host platform, handling equipment and conditions encountered.
The new work follows a 2025 HII–Thales integration and field trial in which SAMDIS 600 was carried aboard REMUS 620. That previous activity established the combination of vehicle and sonar; the latest demonstration adds coordinated mission management, assisted data exploitation, and ANGLER within the same architecture. It is therefore a distinct integration milestone rather than the original announcement of the vehicle-sensor pairing.
The partners describe the resulting arrangement as suitable for a NATO-compliant mission environment, supporting interoperability among allied suppliers. A common architecture can give an operator more choice over individual sensors and vehicles, but complete integration also requires interface qualification, configuration control, cybersecurity arrangements, and consistent operating procedures. Equipment that shares a recognised standard may still need testing to confirm that messages, commands, and fault states are handled correctly by every connected component.
Mine-countermeasure missions place particular value on reducing personnel exposure while retaining the ability to examine contacts carefully. An autonomous survey vehicle can move through a potentially hazardous area without requiring a crewed ship to remain directly over it, while a remotely operated identification system can provide the additional detail needed for subsequent decisions. Neither benefit removes the need to monitor mission progress, manage uncertain classifications, and confirm the condition of underwater equipment after retrieval.
The trial advances HII and Thales beyond their 2025 vehicle-and-sonar integration by showing how detection, classification, reacquisition, and visual identification can be coordinated in one command environment. Qualification aboard particular ships and with other underwater vehicles would still require interface testing, handling trials, and operational evaluation. Those steps will determine how readily the demonstrated architecture can be adopted across different fleets and conditions.
