The Bathy-500 Series of echo sounders was specifically designed to provide the hydrographic surveyor with the best thermalchart based scientific echo sounder in the world. The echo sounder is available in single and dual frequency options and is portable and rugged. It has many features which are specifically designed for ease of use and reliability. SyQwest Inc. has sold over 3,000 Bathy-500 Series echo sounders world wide in the last 10 years.