Watercraft

ISR - International Submarine Races
Sports, Cycling, Human Powered Vehicles, Watercraft - ISR - International Submarine Races. Annual competition on engineering design featuring university teams.
https://www.isrsubrace.org/
Human Powered Boats
The term Human Powered Boat or HPB can refer to rowboats, paddleboats, canoes, kayaks, or even rowing shells. We focus on unique and innovative home-built or production manufactured designs involving lightweight and streamlined hulls, pedals, gears, propellers, and even hydrofoils, in an effort to continually push the envelope and improve performance. We're not selling anything, we just want to have fun and go fast on the water! Welcome aboard...
http://www.humanpoweredboats.com/
Suncatcher
Sports, Cycling, Human Powered Vehicles, Watercraft - Suncatcher. Manufacturer that features a universal, catamaran-type platform of two fiberglass hulls that is used to convert a standard bicycle into a water cycle.
http://www.suncatcher.com/
Nomadic Research Labs
Sports, Cycling, Human Powered Vehicles, Watercraft - Nomadic Research Labs. The story and evolution from Behemoth to Microship, water-type HPVs.
https://microship.com/