Sea Technology

SEP 2018

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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www.sea-technology.com September 2018 | ST 15 iXblue, a global leader in the de- sign and manufacturing of inno- vative solutions for the navigation, imagery and positioning markets, is introducing SeapiX, its 3D MBES (Multi Beam Echo Sounder), dedi- cated to monitoring applications. Aiming to provide water column and seabed indicators for the evaluation of marine environments, SeapiX is a flexible system that can be embedded onto autonomous floating systems such as buoys. Existing acoustic systems are limited by their field of view (usually 7-12°) and spatial resolution (single beam devices) and cannot effectively assess the environmental characteristics such as biomass and seabed. When in use, they require hypotheses (biases) to be made by experts to estimate global values from a very partial measurement. They might also be installed on pan/tilt platforms that require high maintenance costs and energy consumption while still suffering from a poor refresh rate for the global volume scan. SeapiX intrinsic and pioneering characteristics – the system is a stabilized steerable dual Multi Beam Echo Sounder with 128 independent acoustic channels able to produce very fine (1.6°) elementary beams – enable the insonification of a 120° by 120° pyramidal water volume. Depending on the volume that needs to be covered, SeapiX can be set-up from one to three SeapiX antenna units as shown. iXblue's SeapiX has been qualified on several fish species (mackerel, herring, cods, tuna…) and features a unique fish discrimination Geographical Biomass Analyzer ( GBA) processing tool to classify acoustics detections. Indeed, the factory-calibrated antenna can also be recalibrated in-situ by end-users and provides accurate target strength (TS) values thanks to its multi split beam capability, volume backscattering strength and biomass indicators such as NASC. Moreover, it monitors the global habitat by measuring seabed backscatter value and bathymetry. All data provided by SeapiX is georeferenced and time stamped and can be easily exported to standard formats such as HAC, EVD (EchoView) or bathymetry files. In order to adapt to the platform design (autonomy, energy, data HDD), SeapiX is highly configurable: users can define scenarios to be ran, data to be recorded or exported as well as real time streams towards the control station. It has been designed to reduce the operator duties and is easily fitted into a network of systems for large and remote areas monitoring. It is delivered with a GECDIS based plotter system for the display of acoustic swaths, echograms, GBA outputs, and seabed bathymetry/ backscatter value. Marine Protected Areas monitoring thanks to SeapiX Sponsored by iXblue p 4D analysis of herring shoal close to seabed in Echoview. t SeapiX provides a split beam calculation for its entire volume coverage of 120° X 120°.

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