Retrofit existing cargo ships in 48 hours to remove 1.3–1.8 Mt CO₂ per vessel per year via dual rock weathering + electro‑alkalinity, with cryptographic MRV.
Problem
Gigaton-scale durable CO₂ removal is required; existing approaches are capital-heavy and slow to deploy. Idle deck space + ballast flow on today’s fleet are an underused platform.
Solution
Dual pathway: micronised basalt + electro‑alkalinity for yield + permanence.
Rapid retrofit: two ISO skids; no hull penetration beyond ballast pipe section.
Verifiable: pCO₂ / flow / power hashed every 5 min (tamper‑evident MRV).
Economics
Modeled payback <3 months at $30–45/t carbon credit range (base yield). Shipowners share upside; minimal downtime (48 h yard window).
Status & Next
US provisional patent filed 18 Jul 2025.
Mini‑pilot (1,000 h voyage) targeted Feb 2026.
Independent science & engineering validation letters in progress.
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