My buds in Alaska have been using these extremely annoying craft for years. the older models look more like a scooter than a bycicle, the handle bars are on a pivot at the base for up and down motion, there are unstable and fast as hell. Even the best swimmers (like myself) wear a life jacket because it is easy to go ass over tea kettle and smack yer head on the hull at 40 knots. I google but could only find pics of the newer ones.
thanx,
bill