According to Wikipedia, hydrogen is flammable in concentrations from 4% to 75%. Its likely any tank and transfer system for hydrogen fuel would be cost prohibi

According to Wikipedia, hydrogen is flammable in concentrations from 4% to 75%. Its likely any tank and transfer system for hydrogen fuel would be cost prohibitive or risky. It's been a long time since I had chemistry, so I don't know, a lot of people are interested in hydrogen fuel. However, the original post about the boat succeeding at this seems unlikely with current technology.