The HY1601 Echo Sounder System, based on the computer platform, with DSP and digital imaging technology, embedded industrial control system and data acquisition software, is a portable and integrated digital echo sounding system. Its main features are as follows: Standard computer for easy operation interface and data storage, advanced bottom digitizer, internal large storage of data to file with time reference, digitized depth, position heave and annotations and it can compatible with all survey software like HYPACK, EIVA and any other software package. It is a perfect choice for surveying in the river, lake and ocean.