Driven by a GPS system that can track the America's Cup catamarans to within an inch of accuracy on the race course, event organizers realized the opportunity to leverage the system for on-the-water management of the sport.
The Liveline system is used by umpires in a booth onshore who have access to the live feed. If there is an incident needing review, they have an instant replay with the ability to freeze individual frames. One of the greatest results has been that every race held to date has finished on time, something that had previously been impossible in a sport dependent upon wind.
In addition, telemetering of the course is allowing for rapid movement of marks and controlling course limits, while use of real-time overlap and zone-entry determinations enable umpires to make the most accurate decisions ever possible, using the new information to settle protests between boats.