Coastline Surveys Completes Submarine Asset Survey for Wave Hub

SeaDiscovery.com
Tuesday, November 19, 2013

Wave Hub is a grid-connected offshore facility in South West England for the large scale testing of technologies that generate electricity from the power of the waves. It is about 10 nautical miles offshore and is designed to help companies developing new wave energy devices. The U.K. has some of the largest wave and tidal energy resources in Europe which in the right circumstances could generate up to 1/6 of the U.K.’s electricity consumption.

Coastline Surveys was delighted to be awarded the contract to carry out the submarine asset survey including Multi beam bathymetry and Side Scan sonar, ROV Visual inspection and Cable Burial surveys. Additional Geotechnical investigations were undertaken in test berth 4 to assess the seabed nature for future anchoring of proposed test devices. The surveys for this important renewable energy site were successfully completed in July and August 2013. Not only is this an important renewable energy project with which to be involved, it is also located right on the doorstep of Coastlines’ Head Office in Falmouth.

The MV FlatHolm, Coastlines’ 24m fully equipped survey vessel was deployed from its base in Lowestoft and stationed in Newlyn harbor for the duration of the contract along with its full time crew and an in-house team of specialist hydrographic surveyors and geophysicists.

The scope of work included a complete bathymetric survey of the entire cable route to establish seabed and asset conditions. This was carried out with the high resolution R2Sonic 2024 Multi Beam Echo sounder together with a Klein 4200 dual frequency Side Scan Sonar. A Cable Burial survey was carried out on the inshore 8km of the cable. The cable Burial survey was completed with an Innovatum Smartrak cable detection system following a tone applied to the cable. The Smartrak system was mounted on a Cougar XT ROV which was also used for the Video inspection element of the works. Surface positioning was provided by a C-NAV 3050 GNSS System and subsurface was provided by a Nexus Easytrak USBL system. A combination of QPS QINSy, Fledermaus, EIVA Navipac and Innovatum software was used for acquiring and processing the survey.

The project was split into three phases to make the most of the MV FlatHolm’s unique capabilities to carry out all three elements of the scope of works. The Geotechnical investigation was carried out first – comprising Vibrocores at each of the proposed anchor locations in Berth 4. The vessel was then switched to Geophysical mode to complete phase 2 - the full cable length bathymetric survey. Phase 3 comprised the ROV operations including the Visual and Cable Burial surveys.

The biggest challenge to the project was the strong tidal streams on the site which restricted the window of operations for the ROV work. Using the more powerful Cougar XT was a benefit in being able to extend the window of operations. Excellent vessel handling skills by the dedicated Flatholm crew also maximized productivity during this phase of operations.  The ability to remain on site for up to 7-10 days duration enabled maximum use of the working windows with minimal time lost for transit back to port. 

By breaking down the project into phases Coastline was able to offer an efficient and cost effective solution with a platform that was able to complete the entire scope of work from very shallow inshore operations out to the offshore end of the project. All operations were completed within anticipated timescales on site whilst maintaining their enviable safety record.

coastlinesurveys.co.uk
 

Maritime Reporter February 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

ThyssenKrupp Says Submarines Part of Growth Story

Germany's Thyssenkrupp sees its submarine business as making an important contribution to its growth targets, the head of its Industrial Solutions business area said on Tuesday.

Added Value Innovation Drives Control of BWTS

Specifying for ballast water treatment systems can be a difficult process. Ian Hamilton, sales manager for marine electrical wiring control and instrumentation specialists CMR Group, offers guidance.

“Bright Ideas” program - Ash Center - Harvard University

The Ash Center for Democratic Governance and Innovation at the John F. Kennedy School of Government, Harvard University, recognized the Port of Houston Partners

News

Winter in US Northeast Takes a Toll on Ferries

With its black hull rumbling against a field of broken ice, the Warren Jr. slowly eased away from a dock in the Boston suburb of Hingham on Tuesday, aiming to clear

Shipping Industry Faces Shake Up

As global shipping grapples with its worst downturn in 30 years, private equity firms are unwinding massive bets made on the sector in a move set to accelerate

Gulf of Mexico Oil Production on the Rise

Because of the long timelines associated with Gulf of Mexico (GOM) projects, the recent downturn in oil prices is expected to have minimal direct impact on GOM crude oil production through 2016.

Unmanned Vehicles

Indian Navy to Buy 50 Ship Borne Drones

Seeking to enhance its surveillance capabilities on its warships, the Indian Navy (IN) has now announced a global competition for procuring ‘Ship-Borne Unmanned

Underwater Engineering

ThyssenKrupp Says Submarines Part of Growth Story

Germany's Thyssenkrupp sees its submarine business as making an important contribution to its growth targets, the head of its Industrial Solutions business area said on Tuesday.

Ice Coverage on Great Lakes 89 pct: NOAA

Ice coverage on the Great Lakes is nearing 90 percent, reveals high resolution satellites images from National Oceanic and Atmospheric Administration (NOAA).   The entire Great Lakes is at 88.

 
 
Maritime Security Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Ship Electronics Ship Simulators Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2095 sec (5 req/sec)