I think it's just very poorly worded. Sailboats can go faster than the true wind speed, like in the America's Cup, and typically do it do it going upwind. The a

I think it's just very poorly worded. Sailboats can go faster than the true wind speed, like in the America's Cup, and typically do it do it going upwind. The addition of tacking is not wrong, it is zigzagging upwind, but just very oddly worded.