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Marine Electronics


May 2013 Issue

Chelsea Technologies Delivers SeaSoar to Chinaís IOCAS
The Institute of Oceanology Chinese Academy of Sciences (IOCAS) in Qingdao, China, has taken delivery of a Chelsea Technologies Group Ltd. (Surrey, England) SeaSoar towed oceanographic system.

The purchase of the SeaSoar system satisfies the requirement of the IOCAS for a large payload towed oceanographic vehicle capable of undulating down to depths of 500 meters at tow speeds up to 12 knots.

† The SeaSoar system is fitted with a Chelsea MiniPack to measure CTD and fluorescence, plus sensors to monitor turbidity and photosynthetically available radiation. A Chelsea Plankton Sampler with flow meter has also been integrated, as well as third-party instrumentation.

The Chelsea data and flight analysis software will enable the operator to have real-time control over the vehicleís flight profile, together with storage and display of the flight parameters.

Data obtained from the sensors mounted in the SeaSoar will be transmitted to the towing vessel for processing, display and storage via a multi-core tow cable.

The SeaSoar system is to be on permanent deployment from IOCASís new research vessel, the Kexue Hao.

Forum Subsea Rentals Gets INS Technology from iXBlue
Forum Subsea Rentals (Aberdeen, Scotland) has made a further investment in inertial navigation technology with supplier iXBlue (Boston, Massachusetts). The equipment will be utilized for ROV positioning in survey and construction support applications on projects worldwide.

The contract includes a quantity of ROVINS subsea inertial navigation systems (INS), as well as OCTANS gyrocompasses. These OCTANS gyrocompasses can be upgraded to the full INS capability of the ROVINS.

ROVINS can be enhanced with the use of a Doppler velocity log (DVL), which can be coupled directly to the INS or fitted elsewhere on the vehicle. In either case, for best performance, it is necessary to perform an alignment calibration procedure, iXBlue said.

iXBlue engineers assisted Forum in preparing and calibrating six ROVINS/DVL sets to be mobilized to a project this spring. A survey vessel was hired for a week, during which the coupled systems were calibrated, and a number of Forum engineers were fully trained in the procedure by iXBlue engineers.

Woods Hole Awards OOI Contract to AXYS for TRIAXYS
AXYS Technologies Inc. (Sidney, Canada) has been awarded a contract by the Woods Hole Oceanographic Institution to provide up to 24 TRIAXYS Next Wave Directional Wave Sensors as a component of the Ocean Observatories Initiative (OOI).

The TRIAXYS Next Wave is a solid-state sensor comprised of precision accelerometers, rate gyros, a fluxgate compass and the WatchMan500 processor to accurately measure directional waves.

The Woods Hole Oceanographic Institution has already received the first order for the TRIAXYS Next Wave sensors, with planned deployments in mid-2013.

As a fully integrated system of sensors, OOI will collect and disseminate data on coastal, regional and global scales.

Teledyne Benthos Transfers Sonar To Teledyne Odom
The Teledyne Benthos (North Falmouth, Massachusetts) geophysical sonar portfolio, including the Chirp III sub-bottom profiler, C3D interferometric sonar and newly released SIS-1725 side scan sonar, has been transferred to Teledyne Odom Hydrographic (Baton Rouge, Louisiana).

The two business units will collaborate over the course of this year to establish manufacturing at Odomís facility in Baton Rouge.

Dina Star is First Vessel to Get ABBís Onboard DC Grid
The first vessel to feature ABB Ltd.ís (Zurich, Switzerland) Onboard DC grid is the platform supply vessel Dina Star, which has been delivered to Myklebusthaug Management AS (Fonnes, Norway) by Kleven Maritime AS (Ulstein, Norway). ABB also supplied all power, propulsion, automation and advisory systems.

The DC Grid distributes power through a single DC circuit, providing significant power savings. It is intended to enable the vessel to operate at the highest energy-efficiency level to minimize emissions.

Dina Star will serve as a multipurpose oil-field supply and construction vessel in the North Sea.

Currently, the DC Grid is available in low voltage with an installed power up to 20 megawatts. By distributing electricity in DC, the system allows the operation of the generators at a variable speed and, consequently, at the optimal specific fuel consumption. This is particularly beneficial for offshore vessels operating in dynamic positioning mode, where average power demand is low.

ABB unveiled the Onboard DC Grid concept in mid-2011. The grid eliminates bulky AC switchboards and propulsion transformers. This, combined with greater system lay-out flexibility, increases the available space and deadweight for cargo.

TidGen Causes No Adverse Environmental Effects, ORPC Says
The Ocean Renewable Power Co. (ORPC) of Portland, Maine, has submitted its first annual environmental monitoring report for the Cobscook Bay Tidal Energy Project to the U.S. Federal Energy Regulatory Commission (FERC), which details the 2012 construction, installation and operational activities of ORPCís grid-connected TidGen power system in Maine.

Results indicate no observed, adverse interaction of the TidGen power system with the marine environment.

FERC requires licensees such as ORPC to develop adaptive management plans providing strategic guidelines to evaluate environmental monitoring data and make informed, science-based decisions to modify monitoring as necessary. The goal is to maintain appropriate levels of environmental monitoring proportional to project risk.

Federal and state resource agencies came together with ORPC to form an adaptive management team for the Cobscook Bay project and provide oversight of the plan.


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