gps speed detector for rc boats

[jon harter]

is there such a thing as a gps speed detector for rc boats? if so, who has them, how do they work, and what kind of cost are we talking about? jon harter

 

[Blackout]

http://www.intlwaters.com/index.php?showtopic=57985&hl=%2Bgps+%2Bspeed

 

[DeanJohnson]

Search Eagle Tree Systems. They offer a full catalog of telemetry systems specifically designed for R/C.