Page 32: of Offshore Engineer Magazine (Jan/Feb 2025)

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TECHNOLOGY UPDATE SUB-BOTTOM PROFILERS

Jonathan Morvan,

Commercial manager at Hydroconsult and

Benoît Fraleu, CEO at Hydroconsult, with Guillaume Jouve and Calixte Genin from Exail.

Exail wide frequency range, high source level and narrow beams acquire several simultaneous narrow beam sub-bottom ob- - which typically involve physically larger installations. servations in a fan across the vessel. In real-time it will pick “The need for automated solutions to ensure data quali- the strongest re?ection and generate a multibeam sub- ty is becoming more important. Aided and automated sur- bottom image from several high resolution, narrow beams.

vey settings are important to avoid making costly mistakes The TOPAS is a family of parametric sub-bottom pro?l- that requires re-runs, or even revisiting a survey area. The ing systems available in con?gurations from shallow waters user may want data in near real time for their decisions to full ocean depths. The bene?t of the parametric prin- makings. Cloud based solutions giving the user necessary ciple is that it can acquire high quality sub-bottom data information is certainly an important means to allow for with smaller transducer arrays.

sharing the data in an ef?cient manner,” says Mathisen. EM SBP is Kongsberg Discovery’s newest sub-bottom “The need for meeting practical solutions such as installa- pro?ling solution. EM SBP uses the EM 124 or the EM 304 tion space, power requirements, remote operations, as well multibeam echo sounder hardware which for many larger as robustness against user mistakes at the same time as pro- survey vessels already are available on board for bathymetry viding expert users with high ?exibility, is technologically purposes. “EM®SBP allows you to use your multibeam challenging, but yet interesting and very understandable.” system for sub-bottom data acquisition and by that adding

Kongsberg Discovery’s sub-bottom pro?ling systems in- information and value to your seabed survey at low cost, low clude the SBP29, a high power, narrow beam sub-bottom space and low power consumption,” says Mathisen.

system that operates together with the deepwater Kongs- EdgeTech’s 3400 systems now have PVDF receivers and berg multibeam systems. It operates at 2-9 kHz and can “pipeline mode.” The 3400-OTS transmits wide band fre- 32 OFFSHORE ENGINEER OEDIGITAL.COM