The surest way to grow sailing is to make it easy to get on the water with minimal hassle on a boat that is exhilarating to sail—and that’s exactly what the inflatable and ­powered-up Tiwal 3R does.

A roll-up inflatable dinghy ranks as one of the greatest inventions of all time for boaters who like to cruise. I own one myself. It’s light, easy to assemble and quick to inflate, even while aboard ...