An onboard GPS module, open source, to analyze and optimize the trajectory and settings of your RC boat 1 - Why use a GPS on our radio-controlled sailboats? We are curious to know whether using a GPS on our radio-controlled boats during training can help us in our pursuit of performance. We can imagine that by measuring the boat's speed and heading, and comparing them to the wind speed and direction, we will be able to improve our sail trimming and better understand the boat'