The EM 122 12 kHz multibeam echo sounder is designed to perform seabed mapping – bathymetry and seabed imagery – to full ocean depth with an unsurpassed resolution, coverage and accuracy. It represents a major improvement from previous models by offering significantly larger swath width, improved data density, and greatly improved resolution. Beam focusing is applied both during reception and transmission and the EM 122 is equipped with a function to reduce the transmission power in order to avoid hurting mammals if they are close by.