This project aims to implement advanced Detection, Classification, and Localization technologies for underwater unexploded ordnance (UXO) that have reached deployment readiness through rigorous development. The objective is to deploy miniaturized atomic magnetometer and three-dimensional (3D) electromagnetic induction (3D EMI) advanced geophysical classification sensors at the Former Maine Bombing Area Formerly Used Defense Site within Reid State Park boundaries. This implementation will serve as a critical step in transitioning these validated autonomous sensor systems from research to operational application at live sites where UXO are possibly present, supporting data-driven decision making for UXO remediation.

This project plans to integrate and demonstrate key technologies required for configuring and deploying uncrewed aerial system (UAS) magnetometers and amphibious 3D EMI systems to detect and classify munitions along shoreline and offshore areas of the Former Maine Bombing Range. The UAS-magnetometer technology is based on a successful configuration demonstrated in prior studies (MR19-5212) and will be enhanced to improve its overall cost-effectiveness using lessons learned and technical enhancements. Aerial magnetometer data in the form of magnetic anomaly maps and associated target densities will be fused with aerial imagery data to bound the concentration of munitions within the site. Amphibious crawler-based 3D EMI technology will also be implemented to support the detection and provide full classification of individual anomalies identified from the UAS-magnetometer surveys.

This project will provide several direct technological benefits including the demonstration of new UXO survey systems suitable for overcoming many of the gaps in conventional sensing platforms in nearshore and very shallow-water environments. The cost reductions enabled by classification technologies have been well documented and demonstrated on land. It’s likely that these cost savings would be even greater for underwater sites. The integrated crawler-based sensing capability is expected to shorten survey times by as much as 10x relative to divers equipped with hand-held sensors while also providing 100% coverage of offshore munitions response areas. Finally, this combination of technologies will enable a greater operating envelope in terms of the type of environments that can be surveyed. (Anticipated Project Completion - 2026)