Some echosounders can measure the seafloor's ability to reflect sound as well as the depth. By analyzing data from these sounders, Olex are able to calculate the hardness of the sea floor.
The system take into account parameters like: pulslength beamwith and transducer type, and calculates a bottom echo based on hydroacoustic theory. The calculated hardness values is integrated in the seafloor map together with the topographic depht values.
The hardness is displayed in colors. From deep purple for soft, to light yellow for hard seafloor. Depending on type of data input from the ecodounder, various tools for signal processing, settings and history can be opened in separate windows on the screen.