GGC Glider Tracker (and playback)
Google-Earth version (Note that this requires the Google-Earth Plug-In and runs on Microsoft IE or Google-Chrome or Firefox).
2013 Nationals playback links here
Playback of 2012 Nationals FAI class Day 1 here
Playback of 2012 Nationals Club class Day 1 here
Playback of 2012 Nationals FAI class Day 2 here
Playback of 2012 Nationals Club class Day 2 here
Playback of 2012 Nationals FAI class Day 3 here
Playback of 2012 Nationals Club class Day 3 here
Playback of 2012 Nationals FAI class Day 4 here
Playback of 2012 Nationals Club class Day 4 - (no contest day) here
Playback of 2010 US Nationals Day 7 (Uvalde, Texas) here
Playback of the Distributed Contest (Toronto Soaring) (Day 1 - 16 May 2010) here
Playback of the Distributed Contest (Gatineau Gliding Club)(Day 2 - 21 May 2010) here
Playback of the Distributed Contest (Gatineau Gliding Club)(Day 3 - 23 May 2010) here
Playback of the Distributed Contest (Gatineau Gliding Club)(Day 4 - 24 May 2010) here
Playback of the Distributed Contest (SOSA)(Day 5 - 29 May 2010) here
Playback of the Distributed Contest (SOSA)(Day 6 - 30 May 2010) here
Playback of 2004 Nationals here
Playback of 2009 Nationals here