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Displaying items by tag: Wind Turbine Installation Vessels

#POWER FROM THE SEA - This morning the wind farm turbine installation vessel Sea Energy, departed Wicklow Bay having spent over a fortnight based in Wicklow Port, where her Danish crew celebrated Christmas Day, writes Jehan Ashmore.

The Esbjerg registered vessel operated by A2 Sea, arrived in the week before Christmas to work at Airtricity's Arklow Bank Wind Farm, but the nature of the work was based on internal operations only at the seven turbine facility, which each structure scaling to a height of over 70 metres / 240 feet.

Upon completion of her work, she returned to Wicklow where her crew spent the festive season in port with a Christmas tree complete with  lights! at the bow.

She remained in the harbour into the New Year and during the recent spate of heavy weather until finally departing yesterday on Little Christmas, where she overnighted in the bay.

With four towering supporting jack-up legs each 32 metres  high, this enables her to carry out offshore crane operations with greater control. In addition the vessel is raised completely above the water to gain elevation to assist mounting the pre-assembled wind-turbine components from her deck cargo.

She can work in waters of up to 24 metres and as she rests on the sea-bed this provides a more stable working platform.

Sea Energy presented a distinctive profile while in port as she 'sat' close to the Packet Quay, as her jack-up legs make mooring ropes redundant.

The quay is the main commercial quay and during this week she vacated the berth to allow regular caller Scot Isles (2001/2,595grt) which arrived with a cargo of sawn packaged timber products from Scandinavia. Owned by Scot Line, the vessel remained in the port for two days and then departed for Warrenpoint.

The Wicklow Port Company also specialise in dry-cargoes, lead, and scrap-metal as previously reported, to read more click HERE.

It is somewhat unusual for vessel movements in Wicklow to berth outside the harbour piers, as in the case with Sea Energy.

She shifted berths to the seaward side of the West Pier and again she sat with jack-legs lowered in water depths of six metres, leaving a clearance of around two metres below the keel.

Although Arklow is closer to the wind-farm than Wicklow, Sea Energy's 3,332 gross tonnes is too large to be accommodated as the port on the River Avoca has a has lower water depth.

Published in Power From the Sea

Shipyards

Afloat will be focusing on news and developments of shipyards with newbuilds taking shape on either slipways and building halls.

The common practice of shipbuilding using modular construction, requires several yards make specific block sections that are towed to a single designated yard and joined together to complete the ship before been launched or floated out.

In addition, outfitting quays is where internal work on electrical and passenger facilities is installed (or upgraded if the ship is already in service). This work may involve newbuilds towed to another specialist yard, before the newbuild is completed as a new ship or of the same class, designed from the shipyard 'in-house' or from a naval architect consultancy. Shipyards also carry out repair and maintenance, overhaul, refit, survey, and conversion, for example, the addition or removal of cabins within a superstructure. All this requires ships to enter graving /dry-docks or floating drydocks, to enable access to the entire vessel out of the water.

Asides from shipbuilding, marine engineering projects such as offshore installations take place and others have diversified in the construction of offshore renewable projects, from wind-turbines and related tower structures. When ships are decommissioned and need to be disposed of, some yards have recycling facilities to segregate materials, though other vessels are run ashore, i.e. 'beached' and broken up there on site. The scrapped metal can be sold and made into other items.