Sea Technology

DEC 2012

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

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sor gradiometer—delivers signifcantly more information about the target's magnetic feld than conventional sensors used for this type of detection," Leslie said. "It provides data on the location, characterization and magnetic qualities of a target—whether it is a gold deposit or an explosive." More than 10 million acres of coastal waters are contaminated by undetonated explosives, according to SERDP. Typically, these small explosives rust and corrode at sea, making them even more dangerous. The CSIRO sensor can provide geological information that discriminates between prospective and nonprospective areas or targets. It avoids unnecessary drilling and minimizes the risk of overlooking valuable mineral deposits. The sensor has been proved in a stationary laboratory environment. Trials have been conducted to prove it in motion, in preparation for anticipated underwater trials. WFS Tests New Modem At Underwater Centre WFS Technologies (West Lothian, Scotland) tested its Seatooth S100, a new mobile, wireless subsea modem developed for underwater applications from 100 to 4,000 meters, at The Underwater Centre, a subsea testing and training facility in Fort William, Scotland. The Seatooth S100 was trialed in the Underwater Centre's 1.5-millionliter indoor seawater tank, which allowed the WFS team to observe and monitor their equipment in one location without tidal drift. The modem can provide a reliable digital wireless communication link or logging device up to a 5-meters range. It is equipped with standard data communication interfaces, making it suited to sensor and underwater vehicle applications. The Seatooth can be deployed on temporary or permanent installations for subsea applications including data logging, upgrading subsea equipment and wireless backup. MSI Provides Real-Time Current Systems for Seismic Operations Services International (Pty) Ltd. (MSI), based in Cape Town, South Africa, said in November that it had completed a real-time current measurement program for CGG Veritas (Paris, France) to support seismic operations offshore the Ivory Coast. The current measurement system was installed on the support vessel Tanux-1, and provided real-time current profle data both on the Tanux-1, as well as via radio to the seismic vessel Vanquish. The data gathered over 110 days were used to model the effects of localized currents on the towed seismic array. The system comprised a Teledyne RDI (Poway, California) 300-kilohertz acoustic Doppler current profler (ADCP), cabled to a PC running Teledyne RDI's VmDas software. The software controlled the operation of the ADCP, as well as displayed the data in real time on the Tanux-1. A Hemisphere GPS (Calgary, Canada) provided positioning and navigation data to the VmDas software so that the vessel motion was removed from the measurements. Data was then automatically exported to a text fle, which was transmitted via Satel (Salo, Finland) radio modem to the Vanquish. There it was captured by a Campbell Scientifc (Logan, Utah) data logger and displayed using LoggerNet software. The project was the frst time CGG Veritas and MSI worked together. n THIRD DIMENSION REDUCES OPS TIME The OE14-530 3D Color Camera provides real-time 3D images of the subsea workspace. Optimised for use in subsea tele-robotic applications the OE14-530 provides the ROV operator with a comfortable and natural 3D view of manipulator operations with a wide field of view for optimum coverage and enhanced depth perception enabling accurate positioning, faster performance of tasks and reducing the risk of damage. More Discover 3 at UI 201 01 Booth #5 Cost-effective stereo 3D processing subsea Multi-standard HD/SD video capability Compact design Flexible connectivity options Interfaces easily with most commercial-off-the shelf active or passive 3D displays THE FULL PICTURE P Telephone: +44 1224 226500 km.camsales.uk@kongsberg.com www.sea-technology.com www.km.kongsberg.com/cameras DECEMBER 2012 / st 79

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