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Multibeam echo sounders and hydrophones
http://www.teledyne-reson.com
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Attitude sensors and inertial motion sensors, gyrocompas, subsea cable and pipe tracker
http://teledyne-tss.co.uk
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Engineering and consultancy in the building construction, infrastructure and environment sectors
http://www.arteliagroup.com
http://www.concretelayer.com/
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Hydrographic and marine software solutions
http://www.qps.nl
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Specific software and electonic integration
http://www.actris.com
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Piezo-composite transducers and hydrophones
http://www.matsysinc.com
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Tide station, sub-botom profiler, laboraty wave measurements
http://www.generalacoustics.com
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GNSS positioning solutions
http://www.topcon.fr
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