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2017: The R2Sonic Multispectral Challenge

When we released the revolutionary R2Sonic Multifrequency mode, we gave users the ability to collect backscatter data at different frequencies in one pass and with one MBES only. In Multifrequency mode, the acoustic responses of seafloor sediments at different frequencies coincide in time and space. This was a significant contribution for the advancement of research in bottom characterization.


With this innovative breakthrough, R2Sonic founders launched the 2017 Multispectral Challenge. They opened the competition worldwide, challenging researchers and scientists across the globe to explore ways to use multispectral backscatter data for determining bottom type. Six competitors submitted white papers each with the goal to develop an algorithm that robustly and repeatedly could determine bottom type based on multispectral data.

All research papers took different mathematical approaches. So who won?

Of the six competitors, Timo Gaida from Delft University of Technology was awarded first place. The prize? The new Sonic 2026 system. The revolutionary Sonic 2026 system can collect data at up to five different frequencies, ranging from 200kHz to 450kHz and with a low frequency option at 90/100kHz. 


To read, download Timo Giada’s white paper – 




You can download all other white papers submitted to the 2017 R2Sonic Challenge by clicking here.

2019: The R2Sonic Multispectral Water Column Challenge! 



We’re doing it again! This time, in collaboration with four universities (Northern Arizona University, Nova Scotia Community College, the University of Southern Mississippi and Delft University of Technology), R2Sonic collected various samples of Multispectral TruePix™ data and invited a new series of white paper submissions.


Similar to the enhanced seafloor discrimination capabilities identified through the first R2Sonic Challenge, for the 2019 R2Sonic Multispectral Water Column Challenge, we requested submissions exploring new and improved identification, differentiation and characterization of targets in the water column based on the responses observed at different frequencies.


The 2019 white papers are in and we’ll soon have a new R2Sonic winner! The winner will be announced at GEOHAB 2020 in Venice, Italy. 


At R2Sonic, we remain committed to supporting the scientific community by continuing to revolutionize the industry of underwater mapping with breakthrough solutions. 


If you’re interested in collecting multispectral data in a specific area, please let us know; contact us or email us at We’re happy to help!

R2Sonic Products

We offer a simplified portfolio of 4 MBES, all with wideband selectable operating frequencies. What sets R2Sonic apart is the ability to customize each sonar with any of our suite of revolutionary technical options. You can add any of these options to any sonar at any time. You can upgrade remotely from wherever you are, whenever you need.