The objective of this project is to evaluate and validate practical, accurate, and cost-effective methods for positioning and stabilizing quality assurance/quality control (QA/QC) seeds used in Instrument Verification Strips (IVS) and QC seed settings, in underwater environments up to 25 meters deep. This will ensure long-term positional integrity of the seeds used in the QA/QC of Underwater Advanced Geophysical Classification (UWAGC) operations, thereby maintaining the validity and usability of the recorded data in all water depths likely to be encountered. The seeding technology could also be used for QA/QC or other methods used for detection or classification of underwater munitions, including magnetic, optical and acoustic methods.

The project will demonstrate and compare the accuracy and cost-effectiveness of five seed positioning methods, using both direct real-time kinematic global navigation satellite system techniques and commercially available acoustic positioning systems. It will also develop a method for installing and stabilizing seeds using Remotely Operated Vehicles (ROV). A total of four IVS will be installed at a depth of 25 meters each using one of four acoustic positioning systems to position the seeds. The IVS will be validated for suitability in UWAGC by performing a survey, after approximately 12 months of installation, using an ROV positioned with long baseline acoustic positioning system and a compensated magnetometer to aid in locating the seeds, some of which may be below the lakebed after a year of scouring.

The IVS and monuments will also be surveyed using a Ping3DSS Sonar, which will serve to qualify the 3DSS data against the known monument positions. If validated, the 3DSS technology will provide a novel, cost-effective seed-positioning method independent of subsea acoustic positioning.

Seaview Geophysical, Inc. will demonstrate the ability of a robotic grapple, supported by an Active Heave Compensated winch developed as part of ESTCP MR24-8267, to accurately set inert munitions.

Understanding the real-world accuracy, costs, deployment methods, and stabilization techniques associated with the unique application of setting QC seeds will benefit the UWAGC industry broadly. This knowledge will also be essential for establishing IVS and QC seeds at the live site demonstrations planned under ESTCP project MR24-8267, as well as for future ESTCP initiatives.

Additionally, the project will support ESTCP by delivering an accurate and efficient method for deploying inert munitions for use in upcoming field trials. (Anticipated Project Completion - 2028)