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

Technology

Austal Graduates 48 4-Yr Apprentices

Austal USA combined two classes to graduate a total of 48 members of Austal’s cutting-edge four-year apprenticeship program yesterday at a formal ceremony held at the Arthur R.

SimCity

Building Capacity, as Deadline for Trained Crews Nears   “You see that ship. That’s our ship,” says Karsten Saevik, as he directs our attention to the virtual

Maritime Training Five Years from Now: A Look Ahead

For anyone involved in maritime training, now is an incredibly exciting time full of opportunity. More than ever before, there are new advanced techniques and technologies

News

Is China Building a Naval Base in Africa?

Recently, The Namibian reported the existence of a "confidential letter from Namibia's ambassador to China, Ringo Abed, to Namibia's foreign minister stating that

JV Wins $2bln Freeport LNG Contract in US

A joint venture (JV) between CB&I, Chiyoda International and Zachry Industrial has won a contract worth over $2bn from FLNG Liquefaction 3 for a liquefied natural

Puerto Rico Readies for Largest Cruise Ships

Thanks to a pier expansion and enhancement, Puerto Rico will welcome the two largest cruise ships in the world, Royal Caribbean International’s Oasis of the Seas and Allure of the Seas, in 2016.

Surveyors

TDDCL Seeks Input for New Repair Yard

Trinidad Dry Dock Company to develop new ship repair yard at Port of Spain; company requests Expressions of Interest for Environmental Impact Assessment and Geotechnical

Virtual Aids to Navigation Mark Research Equipment

Vesper Marine will provide its Virtual Aid to Navigation technology to the French company CGG, a  geoscience company that provides geological and geophysical survey

US-built Survey Vessel Delivered to Fugro

Newbuild shallow draft survey vessel Fugro Americas was delivered to Fugro on March 18, 2015. Built by Thoma-Sea Marine Constructors in Louisiana, with supervision by Fugro Marine Services Custom,

Underwater Engineering

Statoil: Polarled Pipe-Laying Kicks Off

On 26 March, the Solitaire pipe-laying vessel started on the first stage of the Polarled installation project. The 482-kilometre long pipeline will transport gas

Submerged Politics in Aussie's $39 bln Submarine Plan

Australian government plans to spend 50 billion Australian dollars (US$39.39 billion) on powerful new submarines, has become a political football at home, reports Reuters.

Moskito to Recover Oil from Sunken Wrecks

A tool for removing oil in submerged vessels was developed in Norway by Miko Marine. Moskito is designed to address the pollution threat that exists with the

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Navigation Pipelines Port Authority Ship Electronics Ship Simulators Sonar Winch
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: 0.2108 sec (5 req/sec)