From Belfast to the Brooklyn Navy Yard, Artemis Technologies is scaling zero-emission, high-speed ferries. David Tyler joins Levi and Christian to explain how hydrofoils slash drag and energy use, why 150-passenger boats are the near-term sweet spot, how agencies might fund/lease fleets, and why charging and maintenance look more like EVs than marine diesels. Plus: batteries, safety certifications, and where ferries fit alongside buses and rails.