"In this channel," Spithill continues, "the tide is pretty straightforward. But out on the bay, it's always changing. They have these computer models, but they're never right. And that's one of the cool things: trying to piece it together and being a step ahead. Thinking about, if something does go wrong, what's next? Because as soon as something goes wrong on that bay, it's like an avalanche. It gets big real quick, and it's very difficult to get back ahead of it."