> But any underwater kite faces the same fundamental challenge, says Chris Vermillion, a mechanical engineering professor at the University of Michigan. “It mus

> But any underwater kite faces the same fundamental challenge, says Chris Vermillion, a mechanical engineering professor at the University of Michigan. “It must be continuously flying. That periodic motion requires substantial control.” I'd ask a marine engineer about fouling (both senses), storm currents, broken tethers, and the challenges of underwater maintenance in remote locations.