Version 1. 0 of the Subsea Integrated Infrastructure Corridor (SIIC) presents a unified mid‑depth ocean infrastructure concept integrating four functions into a single neutrally buoyant structure: pneumatic freight transport, HVDC power transmission, tidal energy generation, and NdFeB magnetic fin MHD augmentation. The SIIC extends the HVDC Tidal V1–V4 research series by introducing a 2. 0 m diameter pressurized steel tunnel as the primary structural element, validated for 70 atm hydrostatic pressure and dynamic internal‑wave loading within the High‑Density Steady‑State Kinetic Environment (HDSSKE). Quantitative analysis demonstrates 36 km/h pneumatic freight transport at 0. 0025 kWh/tonne‑km, 180, 000 tonnes/day throughput, and a tidal turbine array generating 51. 5 MW—75× the pneumatic propulsion requirement—making the system fully self‑powered with surplus energy for grid export. The paper formalizes the four‑function integration architecture, Active RPM Governor resonance‑avoidance system, magnetic fin MHD electrode application, biological risk mitigation strategy, and full cost model showing 21M/km capital cost, 20× lower than the Channel Tunnel benchmark.
ROHIT VERMA (Sun,) studied this question.