Boat anemometer: that is, "off with the wind"! Knowing the wind speed is especially useful for practicing most water sports to the fullest . The boat anemometer is able, with really small and portable devices, to give us the exact wind speed thanks to directional sensors. The boat anemometer is available in the catalog in various models offered by the best brands. They are watertight and some models even float in case they fall into the water.