I've only used Navionics (app) to check our speed and I can't speak for the accuracy of it but our top speed (when we checked) was 8.5 kts. Of course, when we're racing I'm not pulling out my phone so I would think we hav probably topped that.

We got hit with a squall while we were racing with the spinnaker set this weekend.

Just before the squall, we clocked 9.1kts on the speed puck. For those with speedometers, what's the fastest you've clocked?