Tools > Seafloor Recorders
Computer based recorders are routinely placed in deep-ocean pressure cases and deployed on the seafloor to record geophysical events, as well as whales. The recorders have acoustic communication links which allow the anchor to be released allowing the recorder to float to the surface for recovery of both instrument and data. These instruments can record continuous whale acoustics data for one year in water depths up to 5000 meters. Blue and fin whale acoustic calls are detected at ranges varying from 20 km to 100 km on such instruments.