Autonomous Deep-Sea Forensic Data Rescue System Using Embedded Systems and Acoustic Telemetry

Digital evidence and forensic storage media are highly susceptible to total destruction in abyssal ocean environments due to extreme hydrostatic pressure, saltwater corrosion, and physical impacts. Traditional protective housings often rely on passive mechanical seals and unmonitored recovery methods, leading to structural fatigue and irreversible loss of data integrity. This paper presents a specialized autonomous deep-sea forensic capsule designed to encapsulate micro-SSD media within a Grade-5 Titanium alloy body. The system utilizes an internal fluid-filled environment (fluorinated liquid/mineral oil) to equalize electrical pressure and ensure positive buoyancy, coupled with a nitrogen-gas hydraulic ejection piston mechanism controlled by an Arduino microcontroller and a fail-safe solenoid latch. For precise recovery, a hybrid acoustic telemetry system transmits positional telemetry through underwater acoustic modems. This hybrid approach guarantees data integrity, mitigates mechanical fatigue, and provides an end-to-end framework for digital evidence preservation in abyssal forensic investigations.