Echo sounder display

PT 7, Ch 9, Section 3.1.4 states that an echo sounder display needs to be available on the bridge. M/S MERSol is equipped with one echo sounder, which operates in the 50kHz-200Khz range. The OOW can manually select the 50kHz or 200kHz transducer, depending on the depth. Additionally, it is possible for the echo sounder to switch between the transducers automatically, without manual input from the OOW. As show in the figure, the echo sounder display, depth indicator, and printer are connected to main and emergency power sources

Echo sounder electrical drawing, M/S MERSol.