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Multibeam Echo Sounders

We are a leading manufacturer of multibeam echosounder systems for seabed mapping. Our product range includes models for all water depths and virtually any application. The benefits of multibeam echo sounders are that they map the seafloor by a fan of narrow acoustic beams, thus providing 100% coverage of the bottom. The resulting seabed maps are more detailed than those obtained using single-beam mapping. The maps are also produced faster, reducing your ship survey time.

Model overview

Comparison table of KONGSBERG multibeam echo sounders:

Model Frequency Min/max depths *) Max swath width   Available configuration
M3 Sonar  500 kHz 0.2 - 50 m 120 degrees 500m and 4000m depth ratings, Ethernet, Ethernet with sync, Ethernet with VDSL and auxiliary port
EM 2040C MKII 200 - 400 kHz 0.5 - 520 m Single head:
5.5xD / 580m /
140 degrees
Dual head:
10xD / 700m /
200 degrees
Single and dual head
EM 2040P MKII 200 - 700 kHz 0.5 - 600 m  7.5xD / 830m / 170 degrees
EM 2040 MKII 200 - 700 kHz 0.5 - 600 m Single RX:
8xD / 920m /
170 degrees
Dual RX:
10xD / 980m /
220 degrees
Single and dual RX configuration for increased swath and with single and dual swath capability for increased seafloor coverage
EM 712 RD 40 - 100 kHz 3 - 600 m 5.5xD / 1300 m /
140 degrees
*1x2, 2x2
*Short CW transmit pulses
EM 712 S 40 - 100 kHz 3 - 1800 m 5.5xD / 2800 m /
140 degrees
*0.5x0,5, 0,5x1, 1x1, 1x2, 2x2
*CW transmit pulses
EM 712 40 - 100 kHz 3 - 3600 m 5.5xD / 4200 m /
140 degrees
*0.5x0,5, 0,5x1, 1x1, 1x2, 2x2
*CW and FM transmit pulses
EM 304 30 kHz 10 - 7000 m 5.5xD / 8000 m/
143 degrees
*0.5x1, 1x1, 1x2, 2x2, 2x4 and 4x4
*Other customer specific conf. available on request
EM 304 MKII 20 - 32 kHz 10 - 11000m 5.5D / 15000m / 140 degrees 0.3x0.5 to 4x4 and customer specific configuration.
EM 124 12 kHz 20 - 11000 m 6xD/35000 m /
143 degrees
*0.5x1, 1x1, 1x2, 2x2 and 2x4
*Other customer specific conf. available on request

* Estimated depth and coverage for EM 712, based on BS= -20dB, NL=35 dB, f= 40 kHZ


Integrating more than one multibeam echo sounder

Depending upon the application, it can make sense to combine 2 or 3 multibeam echosounders with different frequencies into one system. A higher frequency instrument will have better resolution and accuracy than a lower frequency instrument for a certain water depth. The different frequency models listed below are compatible and can be combined freely. If only one instrument is used at a time, a single operator unit is sufficient. However, when more than one frequency is activated for simultaneous operation, one operator unit is required for each instrument.

High accuracy

Our multibeam echo sounders are professional tools for precision mapping of the seabed, complying with the performance standards defined by the International Hydrographic Organization’s performance standards, S-44 edition 5. Our instruments are all characterised by high mapping productivity in combination with exceptionally high sounding accuracy, and a dense pattern of soundings to cover the seafloor in order to reveal all details on the bottom. In addition to the soundings, the multibeam echo sounders produce seabed image data similar to a side scan sonar image. This dataset is useful for characterising the seabed material properties and sometimes for detecting small features not visible in the sounding data.

Complete mapping system

To form a complete mapping system, our multibeam echo sounders are connected to positioning equipment, heading and motion sensing instruments, as well as sound velocity sensors in order to position the soundings correctly.

Portable solutions

Portable solutions can be offered for inshore surveying. Permanent or semi-permanent mounting of the acoustic transducers is recommended for offshore work with surface vessels. Solutions for ROV- and AUV-based multibeam echosounder surveying are available. We have considerable experience and can assist you with practical advice.


Next generation real-time software for EM™ systems

A modern and efficient working environment

Seafloor Information Systems (SIS 5) has been redesigned in order to improve both user experience and work processes. The modern window environment, menus and layout are more intuitive, helping the operator to work more efficiently. The new 3D displays handle all depths, even when displaying shallow water multibeams at maximum ping rate. The background maps are generated from GeoTIFF or S 57 charts using Web Map Services (WMS).

Post-processing software

Post-processing software for cleaning and correcting of multibeam sounding data is offered, as well as tools for producing seabed image mosaics and classification of the seabed sediment types. We offer solutions for complete data processing all the way to the final products, including electronic chart data in the form of S-57 databases and plotting of paper charts.

Prepared for integration

Our multibeam echo sounders are prepared for integration with other acoustic instruments and can be used as subsystems in integrated survey instrumentation solutions, involving centralised synchronisation of the transmission sequence and Marine Data Management.