The Hydrographic Institute of the Republic of Croatia (HHI) has installed a directional waverider buoy in Brački Kanal, in position 43° 29.108'N, 16° 27.799'E (WGS 84 coordinate system), with a light signal (group of five yellow flashes every 20 seconds) visible 4 NM. Navigation is prohibited within a radius of 200 m from the waverider buoy.
The waverider buoy is used to measure height, direction and period of wind-generated waves and surface temperature of the sea. The real-time data on wave heights are available on the HHI website.
The Hydrographic Institute of the Republic of Croatia has a long tradition of measuring wind-generated surface waves in the Adriatic. These measurements are carried out to pave the way for safe traffic of people and goods in the Croatian part of the Adriatic, for management of the sea and seabed resources, and for preserving and protecting the environment.