United States

Extreme heat and cold stress pose serious risks to warfighter health, performance, and mission success. Individual susceptibility to thermal strain varies widely, so real-time physiological monitoring with intelligent analysis is critical to detect early signs of heat or cold injury [1]. We propose a two-stage wearable sensor-AI framework that integrates both mission planning and mission execution. In the planning stage, expected weather, operational activity, and warfighter demographics will serve as inputs to a Bayesian network-based causal inference model. This enables commanders to forecast likely physiological strain (e.g., elevated heart strain, skin temperature, hydration risk), simulate alternative scenarios, and adjust mission design (e.g., workloads, schedules, gear distribution) proactively before deployment. In the execution stage, we will employ continuous multimodal sensing (wrist, chest, helmet sensors) to capture real-time physiological and environmental data. Probabilistic AI models (Bayesian networks with temporal predictors) will infer key strain markers such as Relative Cardiac Cost, Skin Temperature, and Electrodermal Activity, and issue short-horizon forecasts (e.g., minutes ahead) to provide early warning of unsafe conditions. In prior work, we successfully deployed Empatica Embrace Plus wristbands and REED environmental sensors on 100 high-activity workers, building a Bayesian network regression model to predict skin temperature, cardiac cost, and electrodermal sweat signals from activity and weather data. This field study showed that low-cost wearables can yield actionable estimates of physiological heat stress under real-world conditions. Building on these results, our proposed approach will adapt the framework to military operations: integrating soldier-grade sensors (wrist, chest, helmet), tracking markers such as Relative Cardiac Cost (RCC), Skin Conductance Level/Response (SCL/SCR), skin temperature, and enhancing the AI model for real-time prediction and early warning. We will validate the system in the relevant field, simulate training exercises, and demonstrate integration with mission planning tools. This research aligns with ONR (Office of Naval Research) and NRL (U.S. Naval Research Laboratory) priorities in human performance and force health protection [2]. By enabling individualized monitoring and AI-based decision support, the proposed framework aims to improve warfighter survivability, reduce heat/cold casualties, and sustain mission readiness in extreme environments.

References
1. Josh Foster, Simon G. Hodder, Alex B. Lloyd, and George Havenith. 2020. Individual Responses to Heat Stress: Implications for Hyperthermia and Physical Work Capacity. Frontiers in Physiology Volume 11-2020, (2020). DOI: https://doi.org/10.3389/fphys.2020.541483. 
2. Office of Naval Research. n.d. Code 34: Warfighter Performance Department. https://www.onr.navy.mil/organization/departments/code-34.

NAML 2026

Wearable Sensor Data-enabled AI Reasoning Framework for Warfighter’s Thermo-Physiological Survivability and Mission Readiness in Extreme Temperature

machine learning and artificial intelligence

mobile and wearable sensing

occupational survivability

climate model

climate vulnerability

### Welcome to the 10th annual workshop on Naval Applications of Machine Learning!

NAML is the premier annual event showcasing current machine learning research relevant to Naval applications. We welcome participation from the defense community, industry, and academia. The NAML workshop is an opportunity for researchers from Navy research and development centers and our partner organizations to exchange technical ideas and to come together as a team. 
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The 10th Annual Workshop on Naval Applications of Machine Learning (NAML 2026) was held in San Diego, California, March 2-5, 2026. NAML is a forum for interdisciplinary experts from government, industry, and academia to discuss results of ongoing research on theory and applications of machine learning to address some of the most challenging problems faced by our naval forces. 



technical paper

The development of robust vision-based navigation systems for maritime environments is critically dependent on the availability of high-quality, accurately labeled training data. Acquiring such datasets presents formidable logistical and technical challenges. A key difficulty lies in generating synchronized truth data, which requires capturing precise, time-aligned pose information, encompassing position and attitude, for both the UAV and the ship simultaneously. Without this critical truth data, collected imagery lacks the fidelity needed to train the advanced models essential for autonomous navigation. The Vision POD (VisPOD) system was purposefully designed to address these challenges and enable the creation of robust datasets for maritime machine learning applications.

As an advanced data collection system, VisPOD integrates with unmanned aerial vehicles (UAVs) to capture high-quality datasets for the development of vision-based navigation models. VisPOD captures multi-modal datasets across varied positions and environmental conditions, providing the comprehensive data needed for robust algorithm development. Additionally, its precise pose tracking and adaptable imaging capabilities ensure datasets are optimized to meet operational objectives. 

With its scalable architecture and ability to adapt to mission needs, VisPOD represents a powerful tool for advancing maritime data collection and driving innovation in machine learning applications. VisPOD is the essential data collection component of the Vision Navigation (VisNAV) pipeline, delivering datasets that power the automated labeling process, ultimately driving algorithm training and model development. This presentation will explore VisPOD’s capabilities and its role in delivering high-quality datasets for next-generation vision-based navigation machine learning models.


VisPOD’s Vision: Transforming Data Collection for Smarter Machine Learning Models

The mass deployment of Unmanned Systems (UxS) to the fleet burdens operators with increasingly complex decision-making demands that threaten their ability to conduct effective Command and Control (C2) mission management. The decision space required for UxS operations will expand exponentially as future missions scale in size, employ heterogeneous multi-domain platforms, and operate within Denied and Degraded Environments (D2E). Addressing these challenges requires unified, integrated C2 tools that are context-aware, objective-driven, and capable of synthesizing diverse autonomy-enabling technologies. No single capability can meet these needs in isolation; closing these gaps demands a cohesive toolchain that weaves together multiple models into a unified C2-focused solution.

We introduce the Decision Engine for Situational Context, Autonomous Replanning, Task Execution & Scheduling (DESCARTES), a framework designed for rapid integration of advanced autonomy models supporting C2 mission management. DESCARTES incorporates optimized path planning, dynamic environment discretization, priority task queuing, agentic Artificial Intelligence (AI), large language models (LLM), and reinforcement learning (RL) models in a modular architecture.

DESCARTES consists of three core components: the event cloud, the datacore, and an advanced discretizer and path planner called Multi-resolution Adaptive Graphs for Intelligent Cellular Automata Route Planning (MAGICARP). The event cloud, inspired by the Air Force Research Laboratory’s Cognitively Enhanced Complex Event Processor (CECEP), uses MQTT to implement a trigger–response mechanism in which specialized topics activate event sequences defined by behavior models. The datacore functions as a behavior model that records event triggers into a local database, automatically generating new Postgres tables and entries when previously unseen event types are introduced.

MAGICARP is a multi-resolution environment discretization and path-planning framework that partitions the operational space according to local conditions while preserving global structure. Drawing on cellular automata principles, MAGICARP represents the environment as interacting hexagonal cells whose local updates shape higher-level topology. An entropy-guided refinement mechanism directs computational attention to regions of high informational change, enabling localized updates that support scalable, high-fidelity route planning in time-critical domains.

Together, these components enable DESCARTES to evaluate C2 mission plans against behavior models that provide contextual understanding, examine, feasibility, capability, and adherence to rules, doctrine, and commander intent. DESCARTES can integrate this data and replan missions, bring attention to constraint and restraint violations, and provide contextually aware decision support to C2 operators.

Decision Engine for Situational Context, Autonomous Replanning, Task Execution & Scheduling

Naval installations and waterfront infrastructure depend on rapid, repeatable geospatial analysis to inform operations, maintenance, and resilience. Today, those workflows are fragmented: LiDAR is processed in one system, elevation models in another, and change detection and data publishing often require multiple tools and manual coordination. The result is latency, analyst bottlenecks, and limited scalability for mission-critical decisions.

This presentation introduces GeoAgent, an agentic geospatial orchestration framework that automates multi-sensor analysis pipelines through natural-language tasking while preserving existing tools and data environments across DoD and Navy operations.

GeoAgent acts as an orchestration layer over standard GIS and remote sensing platforms (e.g., ArcGIS, ENVI, QGIS) and connects to data services such as STAC, OGC, and AGOL. Analysts can describe an operation in plain language, for example requesting the latest LiDAR or imagery over an area of interest, performing analysis, and publishing results, and GeoAgent automatically executes the required steps behind the scenes. The system uses a protocol-driven integration model (MCP-style service endpoints) to call analytic toolchains, manage parameters, and maintain full traceability for audit and reproducibility.

The approach has been demonstrated through multiple proof-of-concept use cases, including flood detection, infrastructure impact mapping, and LiDAR-based terrain assessment. Across these examples, GeoAgent reduces manual workflow time from hours to minutes, eliminates tool handoffs, and allows both GIS experts and non-technical users to run complex geospatial analyses through simple, conversational commands.

Operationally, GeoAgent supports faster mission response, automated terrain and asset updates, and real-time situational awareness for infrastructure and range management. It provides a scalable way to maintain geospatial currency and deliver consistent, repeatable analysis across mission areas while integrating within existing government toolchains and IT policies.


Agentic Geospatial Orchestration for Multi-Sensor Terrain Modeling and Rapid Infrastructure Assessment

Cognitive overload in naval personnel is a critical operational risk, yet forecasting it remains challenging. While existing deep learning models can predict performance from physiological data, their reliance on purely statistical mappings without biological constraints makes them brittle to sensor changes and provides limited insight into the underlying neural mechanisms of fatigue or stress.

Our work introduces a new paradigm by embedding a classic model from computational neuroscience, the Wilson-Cowan equations, within a deep learning architecture. This structurally informed approach allows us to learn a personalized, low-dimensional dynamical system for each individual, governed by the physics of neural excitation and inhibition.

Our framework comprises three novel machine learning stages. First, a sensor encoder, pre-trained with an anchor-view contrastive objective, fuses heterogeneous sensor data into a modality-agnostic latent space. Second, a deviation-based variational autoencoder extracts a static trait vector by modeling each individual as a unique delta from a learned population-level baseline. Finally, a hypernetwork maps this trait to the specific parameters of a personalized Wilson–Cowan stochastic differential equation, which models the evolution of the subject’s cognitive state as a continuous trajectory.

Validation on complex synthetic systems demonstrates the model’s ability to accurately recover the system’s underlying governing dynamics from observational data. We further show its effectiveness by training on high-fidelity laboratory data and applying it to diverse, high-demand tasks analogous to operational contexts, such as simulated driving and surveillance camera monitoring. The system learns to distinguish between stable focus states and unstable overload states.

This framework provides a direct measure of neural stability. For naval applications, it enables robust fatigue monitoring using available sensors and lays the groundwork for adaptive interfaces in command and control systems that can reconfigure displays in response to an operator’s measured cognitive state, mitigating overload before performance degrades.

Neuro-Dynamic Digital Twins: Biologically-Constrained Cognitive State Modeling from Physiological Signals

SOAR (Smart Obstacle Avoidance through Reinforcement learning) presents a novel, adaptive framework for robust collision avoidance in multi-rotor aerial vehicles operating in dynamic, unpredictable environments. Traditional obstacle-avoidance systems for drones often rely on static rule sets, hand-tuned controllers, or assumptions about environmental regularity. These approaches struggle when confronted with rapidly evolving conditions such as sudden wind gusts, shifting obstacles, or the presence of other aircraft. SOAR addresses this limitation by training an end-to-end reinforcement learning (RL) agent capable of continuously adjusting its control strategies in response to real-time disturbances while maintaining adherence to a prescribed flight path.

The proposed system is developed and evaluated using the NVIDIA Isaac Sim environment, which enables high-fidelity simulation of quadcopter dynamics, sensor noise, environmental chaos, and multi-agent interactions. This platform allows the training pipeline to expose the agent to a broad distribution of challenging scenarios that would be impractical or unsafe to reproduce in real-world testing. Environmental perturbations include wind fields, transient forces, unexpected moving obstacles, and simulated aircraft exhibiting independent motion models. By integrating these diverse disturbances into training, SOAR emphasizes resilience, generalization, and situational awareness.

A key innovation of SOAR lies in its unified reward structure that jointly penalizes collisions, path deviation, and unstable control actions while positively reinforcing precise trajectory following under chaotic conditions. Rather than merely avoiding obstacles, the agent must intelligently compensate for external forces and maintain stable flight, transforming the problem from simple reactive avoidance to proactive, context-aware navigation. This encourages the emergence of control behaviors that dynamically balance safety, efficiency, and path fidelity.

The resulting system demonstrates the potential for RL-driven flight controllers to outperform conventional approaches in scenarios where environmental conditions cannot be fully predicted or modeled. SOAR contributes a scalable methodology for training robust aerial autonomy and highlights the value of simulation-rich RL as a design paradigm for next-generation drone navigation systems.

SOAR: Smart Obstacle Avoidance through Reinforcement learning

This abstract outlines a framework for developing intelligent, interpretable control systems by distilling policies from Reinforcement Learning (RL) agents into instruction-tuned Large Language Models (LLMs). We leverage navy-relevant, Gymnasium-compatible simulators, such as gym-sailing, as an initial training testbed. While this specific environment models foundational tasks such as upwind navigation and tacking, the underlying methodology is designed to be scalable and directly applicable to a wide range of more complex, high-stakes naval control systems, including autonomous underwater vehicle navigation and dynamic multi-vessel coordination. We first train an RL agent to act as an "oracle," generating an optimal dataset of state-action trajectories. This data is then used for policy distillation via supervised fine-tuning (SFT) of advanced, instruction-based LLMs, such as Llama 3.1 and Qwen3 of different sizes and quantization, transforming them into specialized reasoning agents capable of real-time, closed-loop control.

The advantage of the resulting LLM-based controller is its inherent interpretability. Unlike the opaque RL agent, the LLM can articulate a "chain-of-thought" rationale for its control decisions, such as explaining why a specific rudder angle was chosen in relation to wind direction, boat speed, and the target location. These reasoning agents offer high-level insights into the system's functioning, provide actionable strategic recommendations, and excel at generalization. They can adeptly handle dynamic priority switching in multi-objective settings—such as re-tasking from "maximum speed" to "maximum comfort" or "avoid new obstacle"—by processing these new objectives as natural language instructions, a feat unachievable by traditional RL agents without costly retraining.

This capability has direct and powerful applications for naval personnel training. By integrating these reasoning agents into simulators, trainees can engage in an interactive learning loop, querying the AI "skipper" or "tactical officer" for its strategy. This transforms the simulator from a simple practice tool into a dynamic, "explain-by-example" instructional platform, significantly accelerating skill acquisition & deep strategic understanding.

This RL-to-LLM distillation framework is not merely theoretical; it has been successfully validated in other high-stakes, complex domains. As a key proof point, we applied this method to distill policies from a sophisticated multi-agent RL controller responsible for the end-to-end liquid cooling management of HPC systems, such as the Frontier supercomputer. In that case, the distilled LLM controller consistently matched the performance of the original RL policy across key metrics. This approach can also be proven effective in a host of classic OpenAI Gym control environments, demonstrating a robust and generalizable pathway for creating high-performing, interpretable agents from optimized, black-box policies.

Interpretable Naval Control: Reinforcement Learning Policy Distillation for Reasoning-based LLM Agents

The military is increasingly overwhelmed by the sheer volume and complexity of data generated by modern warfare. Traditional methods of processing and analyzing this information are often inadequate, leading to delayed decision-making, reduced situational awareness, and increased risk to personnel. To address these challenges, the military requires advanced AI systems that can efficiently process vast amounts of data, provide actionable insights, and automate routine tasks, enabling faster, more informed, and more effective decision-making. 

Raytheon has been conducting Independent Research & Development to address these challenges as part of our Cognitive Aids to Sensor Processing, Exploitation, and Response (CASPER™) initiative. 

As part of CASPER™, we are exploring cutting-edge Large Language Models (LLMs) and Agentic AI frameworks that can act as intelligent orchestrators and tactical assistants for C2ISR missions. These agents analyze vast amounts of data to deliver real-time alerts, task available sensors, and enhance situational awareness for mission operators. 

We would like to propose a presentation that examines areas where existing C2ISR solutions fall short, describes the approach we are taking with CASPER™ to address these challenges, and discusses ongoing research and development activities aimed at closing key technology gaps.

This presentation will include a short demonstration of CASPER™ utilizing Agentic AI to support a simulated C2ISR mission. Our demonstration will center on a mission scenario in the South China Sea, where a persistent orbit of MQ-4C Triton UAVs is tasked with wide-area surveillance. We will demonstrate how the Agentic AI system aids operators in detecting anomalous vessel activities and dynamically tasking sensors to gather additional information as required. Additionally, we will showcase how these Agentic AI systems enhance situational awareness by responding to natural language queries using the current operational picture and a comprehensive repository of information available through Retrieval-Augmented Generation (RAG).

This demonstration will utilize the RACIE simulation environment that we presented as a poster at NAML 2025. We are requesting a 20-minute Technical Talk for this demonstration, but we would be happy to present CASPER™ as a Lightning Talk or Poster as well.


CASPER™: Transforming C2ISR Systems into Intelligent Combat Team Members

Current United States Marine Corps (USMC) marksmanship and tactical assessments rely on disparate technologies and methods that often provide incomplete human performance data and/or delayed results. Furthermore, assessments often require a one-to-one instructor-to-shooter ratio, which limits throughput for basic marksmanship assessments and impedes measurement of tactical/force-on-force training at scale. Our current program is investigating novel solutions to these issues through the pioneering application of artificial intelligence/machine learning (AI/ML) capabilities embedded within tactical computer fabrics. Sensors (acoustic and accelerometry) and microcontroller units (MCUs) are strategically placed in a malleable fiber and woven into the fabric, creating an imperceptible wearable system with fully encapsulated data collection and performance analysis and prediction. The core of our methodology lies in the application of AI/ML models, including neural networks (NNs), distributed across the fiber’s MCUs. The AI/ML models are designed to analyze the complex factors that contribute to marksmanship performance, including shot timing, precision, and shooter movement. A pilot study focused on determining shot detection, using labeled acoustic data, found that individual tactical computer fibers on both left and right arms achieved high accuracy in shot detection of blind test data. The NN models were first trained on ~800 shots across eight shooters with different postures. The NN was composed of separable convolution and dense layers with ~4000 trainable parameters, small enough to be deployed within the MCU itself. A method of combining the global efficiency of shot detection by the NN and precise peak finding through Shannon energy algorithms was also demonstrated. Live-fire testing included USMC zeroing procedures, the Infantry Marksmanship Assessment course of fire, and complex live-fire and maneuver events. Across these events, the shot timing captured by the tactical computer fibers was within >95% of the data captured by the Joint Marksmanship Assessment Package, the current gold standard for marksmanship assessment in the USMC, and the AI/ML models achieved >93% accuracy in predicting shot detection, with a low rate of false positives. The models also achieved >91% accuracy in predicting shot precision based on pre-shot shooter movement data captured via accelerometry and validated via grouping measurement (mean radius), providing deeper insight into individual shooter lethality. Future research efforts will focus on several key areas to further enhance the capabilities of the tactical computer fabric system. We plan to expand the dataset used to train the AI/ML models, incorporating data from a diverse range of shooters with varying skill levels and experience. We will also explore incorporating additional physiological data measured by the fibers to further improve the predictive capabilities of the AI/ML models.

Artificial Intelligence/Machine Learning (AI/ML)-Enabled Tactical Computer Fibers for Measurement and Evaluation of Live-Fire Shot Timing and Precision

## Background
Wearable devices have become essential tools for continuous health monitoring, yet the physiological signals they collect exhibit substantial heterogeneity in sampling rates, waveform characteristics, sensor quality, and measurement configurations. These inconsistencies present significant challenges for learning robust and generalizable representations, particularly when deploying models across diverse health applications such as mental state recognition, body state inference, physiological parameter estimation, and disease risk screening. Although recent time-series foundation models have demonstrated strong general-purpose capability, they typically lack explicit architectural mechanisms to accommodate the multimodal and cross-sensor nature of wearable sensing data.

## Methods
To address these limitations, we propose NormWear, the first multi-modal foundation model specifically tailored for ubiquitous wearable sensing scenarios. NormWear introduces a channel-aware attention framework augmented by a shared liaison [CLS] token that facilitates both intra-sensor pattern extraction and inter-sensor relational modeling. This design enables the model to flexibly adapt to arbitrary sensor configurations and to capture meaningful cross-modal dependencies. We pretrain NormWear on a large and diverse collection of physiological signals, including PPG, ECG, EEG, GSR, and IMU, from multiple public datasets, using self-supervised objectives to encourage universal and transferable representations. The pretrained model is then evaluated under zero-shot, partial-shot, and full-shot settings across a comprehensive suite of downstream health-related tasks.

## Results
Extensive experiments on 11 publicly available wearable sensing datasets, covering 18 downstream applications, demonstrate the strong generalizability and robustness of NormWear. Across mental health assessment, body state inference, vital sign estimation, and early disease risk evaluation tasks, NormWear consistently outperforms state-of-the-art baselines. The model shows substantial gains in zero-shot transfer, maintains competitive performance with limited labeled samples in partial-shot scenarios, and sets new benchmarks in full-shot fine-tuning. Ablation studies further confirm the effectiveness of the channel-aware attention mechanism and the shared liaison token in enhancing cross-sensor adaptability.

## Conclusion
NormWear establishes a unified foundation model architecture for heterogeneous wearable sensing data, offering strong representational consistency across diverse physiological modalities and device configurations. By enabling reliable zero-shot and few-shot transfer to a wide range of health-related tasks, NormWear provides a scalable and practical pathway for building generalized wearable AI systems and advancing real-world digital health applications.

Toward Foundation Model for Multivariate Wearable Sensing of Physiological Signals

The integration of Artificial Intelligence (AI) into naval operations offers transformative capabilities for mission readiness, predictive analytics, and decision superiority. Yet, these benefits introduce governance challenges that demand a structured approach. AI governance must ensure transparency, compliance, and operational resilience while mitigating risks from unapproved or uncontrolled deployments.

A critical component of this framework is AI Discovery, which provides full visibility into all deployed models and tools across shipboard, shore-based, and cloud environments. Discovery enables inventory management, compliance checks, and identification of unauthorized AI usage, ensuring that only validated solutions are operational. This capability reduces risk and strengthens trust in mission-critical systems.

Governance should also include centralized policy enforcement, continuous monitoring, and risk scoring for every AI asset. Automated validation workflows should confirm adherence to ethical principles, cybersecurity standards, and mission objectives. Integrated dashboards should deliver real-time insights into model performance, bias detection, and anomaly alerts, while lifecycle controls manage versioning and retraining to maintain accuracy and reliability. Human-in-the-loop checkpoints remain essential for high-impact decisions, aligning with Department of Defense Responsible AI principles.

By institutionalizing these capabilities, the U.S. Navy can accelerate AI adoption while safeguarding mission integrity and national security. This approach ensures that innovation advances without compromising trust, legality, or operational control.

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