Hawk-eye technology uses multiple high-speed cameras and triangulation to track the path of a ball in sports like cricket and tennis. It consists of a tracking system that calculates details of the ball's movement and speed, and a video replay system that records and displays the ball's most statistically likely trajectory. Hawk-eye is used in cricket for contentious decisions like leg before wicket and has improved accuracy of calls to over 99%. Developers continue enhancing the system for additional sports and applications.