The modern racing yacht is awash with onboard instruments and electronics giving enormous amounts of data. But few people fully understand how to get the most out of all the information at their fingertips, let alone make it useful for the team to enable them to win races. But ace navigators, Mark Chisnell and Gilberto Pastorella, do – both have worked with professional sailing programmes all over the world – from America's Cup to Maxi, ORC / IRC and one-design fleets. In Mastering Data to Win they take the reader through the process: from understanding the concepts, ensuring accuracy, using the data to win races and then post-race analysis to find performance gains. By mastering your instruments you can make the right calls every time and know for certain when to tack, which shift to look out for and how the tide can work with or against you. With colour diagrams and photographs throughout, this instructional guide turns information into excellence. Accessible to those new to racing, it also has a depth of information that will transform the performance of even professional sailors.