Given the high costs of nautical instrumentation, the need arose to find a reliable and precise tool that would allow me to monitor the consumption of my boat. Modern technology now gives the possibility of being able to create devices of all kinds at low cost. NaviFlow integrates bluetooth technology with boating. Why all this? We know that it only takes a few laps less to save over 30% of fuel: all engines have an optimal rpm, which varies from boat to boat, depending on the sea, the weights loaded and other factors. Discovering the optimal pace will save us money and respect the environment a little more, a sore point of every boater who loves nature.