Multibeam echo sounder

The EM 304 MKII is the successor of the highly acclaimed EM 302 and the EM 304 MKI multibeam echo sounder. Its broad range of functionality supports simultaneous collection of multiple data types, saving time in the planning, execution and analysis phase. The low noise echo sounder delivers superior data which requires minimal post-processing.


  • Echo sounder
  • Multibeam echo sounder software
  • Multibeam echo sounder
  • Transducer
  • Positioning & attitude
  • Multibeam
  • Deep sea exploration
  • Oceanography

Modular and Flexible Design

The EM 304 MKII consists of new, state-of-the-art electronics and separate transmit and receive transducers in a Mills Cross configuration. It utilizes the same field-proven receive transducer as its predecessor, EM 302, and a new redesigned wide band transmit transducer increasing the depth and coverage. Care has been taken to design a highly modular and flexible solution with compact electronics for easier and faster installation. Due to a flexible transducer design, the system can be tailored to almost any required size.

Full Seabed Coverage

The transmit fan is divided into up to 16 individual sectors in dual swath mode. This allows for unique control of the transmit fan, enabling active stabilization in real time to correct for any yaw and pitch movement of the vessel, while roll stabilization is applied on the receiving beams. The result is a stabilized system for full ensonification of the seabed with equally distributed footprints, even in bad weather conditions, leaving no gaps or holes in the mapped area.

Clean, High Resolution Data

The system fulfills, and even surpasses, IHO S-44 order 1A. Due to the sector transmission technique, the system produces a strong dampening of multi-bounce interference from false echo, resulting in significantly cleaner data. Near-field beam focus is applied in real time, both during transmission and reception. As a result, there is a much higher resolution representation of the seabed.

Key features

  • Wide frequency range
  • Seabed image
  • Water column display and logging
  • FM chirp
  • Roll, pitch and yaw stabilisation
  • Short pulse lengths, large bandwidth
  • Transmit and receive nearfield focusing
  • Dual Swath
  • Mammal Protection
  • Water column phase logging
  • Extra detections

We offer comprehensive after-sales assistance

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