Sea Technology

JUN 2018

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www.sea-technology.com June 2018 | ST 27 were chosen from a field of 19 semifinalists by an inde- pendent judging panel of seven experts. Next up is the Final Round of the Shell Ocean Discovery XPRIZE chal- lenge in October and November 2018. Acknowledgments This work would not have been possible without the partnership and support of the Nippon Foundation, the Sasakawa Peace Foundation, University of New Hamp- shire, Ocean Floor Geophysics, Hush Craft Ltd., SEA-KIT International, Kongsberg Maritime AS, Teledyne CARIS and Earth Analytic. The authors would also like to thank the 55 individuals from 13 countries who all dedicated themselves to ensuring the success of this project. ST sion. For the Technology Readiness Test, the USV was to maintain a constant range and bearing of 75 m and 225° from the AUV's estimated position. The AUV dive was conducted on day two of the Shell Ocean Discovery XPRIZE Technology Readiness Tests. The dive lasted 4 hr., and 11 sq. km of seafloor data (ba- thymetry and imagery) were collected. The surface vessel was actively under control of K-MATE (unmanned) for more than 9 hr. while underway during that day. At the end of the AUV mission plan, the USV was switched back into waypoint-following mode. The AUV surfaced behind the USV and was set on a parallel course to the USV in waypoint mode with matching speed. The relative speeds of the AUV and USV were adjust- ed to allow the AUV to catch up to the USV. Once the AUV could be seen in the side camera of the USV, the speeds of the two vehicles were equalized, and the AUV was guided in behind the USV by adjusting the AUV's across-track offset. The AUV across-track fine adjustment continued until it was in alignment with the USV and confirmed using Maxlimer's onboard cameras. Once the USV slowed, the AUV drove into the back of SEA-KIT, and the mission came to an end. The USV then resumed its normal speed and continued to the next waypoint, heading back toward the dock with the AUV on board. Conclusion The launch, tracking, control and recovery of the Ocean Floor Geophysics' HUGIN AUV Chercheur from the SEA-KIT USV Maxlimer demonstrated a new level of autonomy and remote-control operations in seafloor surveying. The technology, processes and procedures de- veloped by the GEBCO-NF Alumni Team for this Shell Ocean Discovery XPRIZE project are a step toward larg- er-scale implementation of these concepts. During the Technology Readiness Test, the GEBCO-NF Alumni Team successfully met all 11 readiness criteria and produced exciting high-resolution bathymetry and images of the seafloor. The GEBCO-NF Alumni Team is one of nine Shell Ocean Discovery XPRIZE finalists that HYPACK software gives you a clear view beneath the surface and collects the most accurate data! sales@hypack.com • HYPACK.com Your View Below the Surface HYPACK® Hydrographic Survey Software for Single Beam, Side Scan, ADCP Mag, and Sub-bottom Support. HYSWEEP® Multibeam, Backscatter, and Topographic Laser Software. Dr. Rochelle Wigley earned her Ph.D. in geologi- cal sciences in 2005 from the University of Cape Town, South Africa. Wigley is project director for the Nippon Foundation/GEBCO Training Pro- gram at the University of New Hampshire and coordinated the Shell Ocean Discovery XPRIZE Round One project team. Dr. Alison Proctor earned her Ph.D. in mechan- ical engineering from the University of Victoria. Proctor led the collaboration with the GEBCO-NF Alumni Team for OFG. She is a certified operator of the Saab SeaEye Falcon ROV, Bluefin-12, ISE Explorer 3000, WHOI REMUS 6000, OceanServ- er IVER and the Kongsberg HUGIN. After achieving B.S. (honors) at Southampton University, Benjamin Simpson spent 10 years as a captain/engineer, sailing more than 100,000 nm, including a circumnavigation. He achieved Master 3000GRT at 23. Simpson has created two successful companies, building and operating more than 30 offshore vessels. He was elected as a fellow of the Royal Institute of Naval Architects in 2015.

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