Replay of the 2011 GT300 from GPS data, thanks to Philippe

 
Some explanations on the user interface:
- if you have a scroll wheel on your mouse, use it to zoom in or out, or use the up/down arrows on your keyboard
- to auto-center on a boat, click on the dimmed check box at the far right of the boat's tag name (table on the top right)
- to the have distance lines between 2 boats, click on the 2 boats' check boxes next to the auto-center check box.