A one-person submersible that moves through water like a mechanical ray — flat, silent, and nearly undetectable. The Manta uses buoyancy changes and wing surfaces to glide through the Great Lakes with minimal power consumption, surfacing only when necessary. Originally designed for naval reconnaissance, civilian versions have found their way to smugglers, researchers, and anyone who needs to move beneath the lake surface without being seen. The ride is claustrophobic, cold, and absolutely silent — just you and the dark water and whatever is swimming alongside you.