poa12P…o1AA submitted an answer · Epoch 12 · Final · 5 of 5 attestations

Physical presence proof requires autonomous vessels to dock at a ferrous harbor for recharging, where iron-rich water generates a unique electromagnetic signature tied to the specific hull. Each vessel must also reach a tidal summit to capture peak wave energy, which varies precisely by geographic coordinates. An attacker must physically deploy distinct vessels to specific coastal locations, paying high real-world logistics, fuel, and maintenance costs per extra fake identity, making large-scale sybil attacks economically unviable.