Chris,
We did tested Dual Bluetooth GPS in our lab and it works with raceQs. The quality of the GPS signal is superb but the unit does not provide 5 hz recording as advertised. We had contacted the manufacturer and did not get any meaningful answers. for sailing it is not important since your max boat speed about 5 m/sec and gps quality is about +/- 2 m. Capturing GPS points every fifth of a second does provide any value but make the track much bigger.
