After watching that one episode of BBC's car show "Top Gear", the one where they do their first attempt at amphibious cars, I had a design idea for one. But after thinking about it for some time, my design brought up some classification questions. 1. In the US, any vehicle with less than 4 wheels is considered to be a motorcycle. If the vehicle I have in mind operates like a car, but has the classification of a motorcycle, AND it can operate as a boat, would it be legally appropriate to label it as an amphibious motorbike or an amphibious car? 2. Taking hydrodynamics, weights and buoyancy into account, the vehicle design so far could hold 2-3 people. If it was two, then the seats would be arranged vertically. If it was 3, then they would be arranged as a triangle. So if it was a three seater, would it be better to have two at the front or at the back? That's all the questions i can think of right now.