Stand-up paddleboards (SUPs), powered surfboards and even hydrofoiling surfboards are all becoming increasingly popular, but buying one of each could get expensive. That's where the modular XFoil ...

I was lying on my ­stomach, floating on the Ashley ­River on what appeared to be a surfboard until I pressed a couple of ­buttons on the remote-control unit strapped to my wrist. I started to glide ...