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Vertical and multibeam echosounders are essential tools in marine research and hydrography for mapping and analyzing underwater environments. Vertical echosounders emit sound waves directly downward and measure the time it takes for them to return from the seafloor. This method provides accurate depth measurements and is ideal for generating simple depth profiles. Multibeam echosounders, on the other hand, emit sound waves in a wide, fan-shaped pattern, allowing them to cover a much larger area of the seafloor. This enables the creation of detailed 3D maps and the identification of seabed structures and objects with high resolution. Both techniques are critical for navigation, environmental monitoring, and the planning of underwater construction projects. 

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 Echosounders

Multibeam Echosounders​Singlebeam Echosounders​

Multibeam Echosounders

A multibeam echosounder is an advanced hydroacoustic instrument used for the precise mapping and study of the seafloor and underwater environments. It emits sound waves in a wide, fan-shaped pattern, allowing a large area of the seabed to be scanned simultaneously. The reflected sound waves are captured by multiple receivers, which measure the time and angle of the returning signals. These data are processed to generate detailed 3D images and maps of the underwater landscape.

Nautilus Marine Service GmbH is your experienced and trusted partner for sales and support of R2Sonic multibeam echosounder systems in Germany, Austria, and the German-speaking part of Switzerland. In addition, we provide all related services, including consulting, installation, and maintenance of complete hydrographic survey systems, as well as training and ongoing customer support for R2Sonic users.

R2Sonic multibeam systems were originally developed for bathymetric surveys.


They are also suitable for a wide range of additional applications:

  • Bathymetric mapping
  • Sidescan imaging and search operations
  • Imaging of vertical structures (e.g. sheet piling, pilings, wrecks)
  • Data acquisition for seafloor classification using multispectral recording
  • Use as a forward-looking sonar

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Singlebeam Echosounders

The Hydrolite echosounders are mobile and cost-effective singlebeam sounders developed by the U.S.-based company Seafloor Systems. 

The sounder transmits depth data via serial output or Bluetooth using standard data exchange formats and can be integrated with a wide variety of GNSS systems. The systems are supplied with a mounting pole that allows the echosounder to be fixed to a vessel. The top of the pole includes a mount compatible with common – and optionally supplied – GNSS antennas. When equipped with a GNSS receiver, this setup forms a fully functional hydrographic survey system, which can be quickly deployed and used on-site.