America's Cup: Leaning on the weatherman to get it right

Emirates Team New Zealand and Luna Rossa start a practice race on the Hauraki Gulf.

Even more so than previous America's Cups, the AC72 sailing and support crews are very dependent on weather predictions.

In this clip from the Emirates Team NZ media unit, tactician Ray Davies talks about how times have changed the weather – and how they make use if the weather data painstakingly gathered by meteorologist Roger Badham so that the boat is configured to suit the conditions expected on race day.