GPS Action Replay is for sports people such as windsurfers and kite boarders who use GPS data loggers to monitor performance. The GPS data is loaded into a computer and GPS Action Replay picks up this data. The data is firstly cleaned of invalid readings and any stop periods flagged up. Using just two simple tools, the user can then home in on the best performances of the day. The first tool allows the direct deletion of periods such as accidental inclusion of car journeys. The second tool asks for the minimum speed to include and the time periods either side of these speeds. This allows top speeds to be seen as well as the starts and endings of these best runs. Data is simultaneously displayed on a map and a speed chart making editing very easy. When ready, the KML file for Google Earth is then exported. Users have choices for the display of the KML data before saving the file. GPS Action Replay then launches Google Earth to replay the top performances at the real speeds and locations of the day.