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Displaying items by tag: Dredger

An operation has begun as promised by the Drogheda Port Company on Monday, to stabilise the grab hopper-dredger Hebble Sand which having floundered, began to take on water and sink in the Co. Louth port last week.

At the site where the owners of the 59-year-old dredger and crews who from early on Wednesday morning at the port began to carry out remedial work on the ship.

To assist in carrying out the task, a crane has also been erected at the site. They will be pumping water out of the dredger into IBC’s and will be sending divers down to assess what repair has to be done.

Current Harbour Master Martin Donnelly was in attendance to oversee the operation, with his replacement Laurence Kirwan.

Further details of the operation reports the Drogheda Independent of the veteran vessel which has been idle at the port since 2014.

Published in Drogheda Port

In Drogheda Port a dredger that's leaking fuel into the River Boyne is to be refloated and removed.

The 'Hebble Sand', which contains hundreds of litres of diesel, partly sank below the waterline last week after spending a decade in the port.

Louth County Council has told Independent councillor Kevin Callan that the vessel will be brought back to the surface tomorrow.

It will then be brought to a different location to be dismantled at a later date.

Councillor Callan says the leak will first have to be stemmed:

As LMFM's coverage includes an audio clip on comments made by the councillor. 

Published in Drogheda Port

#DublinBay - A dredger docked in Dun Laoghaire Harbour just days before Christmas Day, remains in port due to space restrictions in neighbouring Dublin Port, writes Jehan Ashmore.

The hopper dredger Freeway which Afloat tracked upon arrival to Dublin Port in October, had carried out dredging works until ceasing operations for the festive season.

Freeway departed the capital and across Dublin Bay to arrive in Dun Laoghaire Harbour on 22 December, following permission sought from Dun Laoghaire Harbour to lay-up for the holiday period.

It is common prectice, Afloat adds for dredgers based in Dublin Port, to dock at the North Wall Quay Extension (next to the East-Link bridge) during dredging campaigns. The inaugural call of Irish Ferries giant newbuild cruiseferry W.B. Yeats however at 194m long has taken up a commanding presence along the North Wall. 

The lack of quay space on the North Wall for the 92m Freeway is also attributed in part to the long-term berthed Shingle. The 32m vessel has lain idle since detained more than four years ago.

By coincidence, both the dredger and cruiseferry are Cypriot flagged. On related note to ferries, the North Wall is where operator P&O Ferries use berths at Terminal 3. The linkspan coupled by the frequent ferries occupy the remaining length of the North Wall.

Since the W.B. Yeats has shifted berths to the North Wall, the cruiseferry had returned to Terminal 1 to undergo further berthing including trials at a nearby linkspan. The 1,800 passenger/1,200 vehicle cruiseferry is currently back at the North Wall, though further research reveals the new ship is to shift berths on New Year's Day.

The cruiseferry is to enter service next month, initially to Holyhead and from mid-March, connecting the capital to Cherbourg, France. 

As for the Freeway, it is scheduled to depart Dun Laoghaire Harbour on Wednesday. This will see the dredger return to Dublin Port to resume work. 

Published in Dredging

Marine Institute Research Vessel Tom Crean

Ireland’s new marine research vessel will be named the RV Tom Crean after the renowned County Kerry seaman and explorer who undertook three major groundbreaking expeditions to the Antarctic in the early years of the 20th Century which sought to increase scientific knowledge and to explore unreached areas of the world, at that time.

Ireland's new multi-purpose marine research vessel RV Tom Crean, was delivered in July 2022 and will be used by the Marine Institute and other State agencies and universities to undertake fisheries research, oceanographic and environmental research, seabed mapping surveys; as well as maintaining and deploying weather buoys, observational infrastructure and Remotely Operated Vehicles.

The RV Tom Crean will also enable the Marine Institute to continue to lead and support high-quality scientific surveys that contribute to Ireland's position as a leader in marine science. The research vessel is a modern, multipurpose, silent vessel (designed to meet the stringent criteria of the ICES 209 noise standard for fisheries research), capable of operating in the Irish Exclusive Economic Zone (EEZ). The Tom Crean is able to go to sea for at least 21 days at a time and is designed to operate in harsh sea conditions.

RV Tom Crean Specification Overview

  • Length Overall: 52.8 m
  • Beam 14m
  • Draft 5.2M 

Power

  • Main Propulsion Motor 2000 kw
  • Bow Thruster 780 kw
  • Tunnel thruster 400 kw

Other

  • Endurance  21 Days
  • Range of 8,000 nautical miles
  • DP1 Dynamic Positioning
  • Capacity for 3 x 20ft Containers

Irish Marine Research activities

The new state-of-the-art multi-purpose marine research vessel will carry out a wide range of marine research activities, including vital fisheries, climate change-related research, seabed mapping and oceanography.

The new 52.8-metre modern research vessel, which will replace the 31-metre RV Celtic Voyager, has been commissioned with funding provided by the Department of Agriculture, Food and the Marine approved by the Government of Ireland.

According to Aodhán FitzGerald, Research Vessel Manager of the MI, the RV Tom Crean will feature an articulated boom crane aft (6t@ 10m, 3T@ 15m), located on the aft-gantry. This will be largely used for loading science equipment and net and equipment handling offshore.

Mounted at the stern is a 10T A-frame aft which can articulate through 170 degrees which are for deploying and recovering large science equipment such as a remotely operated vehicle (ROV’s), towed sleds and for fishing operations.

In addition the fitting of an 8 Ton starboard side T Frame for deploying grabs and corers to 4000m which is the same depth applicable to when the vessel is heaving but is compensated by a CTD system consisting of a winch and frame during such operations.

The vessel will have the regulation MOB boat on a dedicated davit and the facility to carry a 6.5m Rigid Inflatable tender on the port side.

Also at the aft deck is where the 'Holland 1' Work class ROV and the University of Limericks 'Etain' sub-Atlantic ROV will be positioned. In addition up to 3 x 20’ (TEU) containers can be carried.

The newbuild has been engineered to endure increasing harsher conditions and the punishing weather systems encountered in the North-East Atlantic where deployments of RV Tom Crean on surveys spent up to 21 days duration.

In addition, RV Tom Crean will be able to operate in an ultra silent-mode, which is crucial to meet the stringent criteria of the ICES 209 noise standard for fisheries research purposes.

The classification of the newbuild as been appointed to Lloyds and below is a list of the main capabilities and duties to be tasked by RV Tom Crean:

  • Oceanographic surveys, incl. CTD water sampling
  • Fishery research operations
  • Acoustic research operations
  • Environmental research and sampling operation incl. coring
  • ROV and AUV/ASV Surveys
  • Buoy/Mooring operations