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Ports and Dredging Main contents V OX MÁXIMA at work on Maasvlakte 2 C utter suction dredgers for rock cutting Summer 2010 | e 175 I HC Offshore & Marine builds unique Diving Support Vessel (DSV) I HC Parts & Services Europe renovates severely damaged Beaver dredger IHC 8527MP® goes into service O ver 20 years’ experience with SCADA IHC Merwede is focussed on the continuous development of design and construction activities for the specialist maritime sector. It is the global market leader for efficient dredging and mining vessels and equipment – with vast experience accumulated over decades – and a reliable supplier of custom-built ships and supplies for offshore construction. IHC Merwede has in-house expertise for engineering and manufacturing innovative vessels and advanced equipment, as well as providing life-cycle support. Its integrated systematic approach has helped to develop optimum product performance and long-term business partnerships. The company’s broad customer base includes dredging operators, oil and gas corporations, offshore contractors and government authorities. IHC Merwede P.O. Box 204 3360 AE Sliedrecht The Netherlands T +31 184 41 15 55 F +31 184 41 18 84 www.ihcmerwede.com firstname.lastname@example.org Ports and Dredging Contents Editorial Dear reader, This issue of Ports and Dredging will be distributed at the WODCON XIX conference on 8-12 September in Beijing and the SMM exhibition on 7-10 September in Hamburg. In the past six months, we have completed many projects at IHC Merwede and this issue reports on new ships, the upgrading and refurbishment of existing ships, plus other exciting developments. 59° 19’ 44.90” N Page The VOX MÁXIMA is an extraordinary dredger in every respect. 0° 22’ 39.96” E 20 While she was being launched by HRH Princess Máxima of SEVEN ATLANTIC commissioned The Netherlands, Ports and Dredging had the opportunity to observe the dredger and her crew at work. We hope that you Page 10 will be equally impressed when you read the feature on page 10. IHC Merwede has built a wealth of cutter suction dredgers (CSD) of all types and sizes. The second feature on page 16 explains the special design requirements of rock cutting 39° 26’ 18.22” N Page applications. As a reliable source said, “A CSD doesn’t become 0° 18’ 51.50” W 34 a rock CSD by equipping the cutter head with pick points, or by In close collaboration... overpowering it.” The diving support/offshore working vessel, SEVEN ATLANTIC, left our yard in early springtime and is another extraordinary ship due to the level of advanced equipment on board. Find out the customer’s appreciation on page 20. The fourth feature on page 26 explains how an IHC Beaver® was damaged when she collided with a World War II mine in Wilhelmshaven harbour. Our RIO Europe successfully recovered the dredger and handed her over ‘as good as new’ to owner Möbius Bau-Aktiengesellschaft in Hamburg. Following the success of the IHC 7025MP® CSDs in the Chinese dredging market, the first two examples of their bigger sister, the IHC 8527MP® were introduced (see page 30). They proved to be extremely versatile dredgers, even for the most challenging soils. We congratulate G&H Shunhang, the owner of the first two IHC 8527MP®s and soon to take delivery of another four. Finally, the laws of Moore, Microsoft and Intel affect our highly automated workhorses as much as our professional and personal lives: computers must be routinely changed every three to five years. DEME took this step for three of its trailing hopper suction dredgers, dating back to the beginning of the century. On page 34 we demonstrate how design choices and excellent cooperation between the contractor and Further in this edition IHC Merwede considerably improve this anticipated schedule, 4 Newsflash from the group and help to prepare the vessels for the challenges of tomorrow. 16 Power girls 26 Fixing up a casualty of war We wish you a successful visit to WODCON or SMM, and we 38 On order & Recently delivered hope you enjoy this issue. Kind regards, Raymond Hendriks 2 IHC Merwede | Ports and Dredging | Summer 2010 51° 58’ 12.24” N 4° 01’ 19.20” E A sight for sore eyes Page 38° 54’ 45.46” N 30 121° 41’ 55.51” E P owerful Chinese CSDs working successfully Ports and Dredging Cover: VOX MÁXIMA, Maasvlakte 2 Coordination: K. Jansen Ports and Dredging is published by Corporate Communication IHC Merwede IHC Merwede. Production: The articles appearing in this journal Die Haghe/AM&S, The Hague, may be reproduced in whole or in part The Netherlands on the condition that the source is quoted. Editorial board: M.O. Boor, H.J. Cornegé, R. Hendriks, Editorial and correspondence address: A. Kik, L.A. Klootwijk, A. Korevaar, IHC Merwede, PO Box 204, S.G. Mensonides, H. van Muijen, E. Put 3360 AE Sliedrecht, The Netherlands. The articles were published with Copyright: IHC Merwede the cooperation of: ISDN: 0166-5766 Ms P. van der Haar (PUMA) Ms G. Brinkers (Van Oord) For more information about any Mr J. Lefever (DEME) article, please contact IHC Merwede. 3 IHC Merwede | Ports and Dredging | Summer 2010 Newsflash from the group March 2010 ew Government financing facility for capital goods exporters explored by IHC Merwede N On Tuesday 16 March 2010 the first working capital financing facility was officially signed and presented at a special meeting between IHC Merwede, Atradius Dutch State Business and a consortium of banks. The facility is backed by the Dutch Government’s new working capital guarantee. IHC Merwede is the first capital goods exporter to use this new financing opportunity. The facility has been set up to stimulate Dutch exports and to support credit facilities for Dutch capital goods exporters. The financing facility was established in close cooperation between IHC Merwede, its bank consortium – of Rabobank, Commerzbank, Royal Bank of Scotland and ING Finance – and Atradius Dutch State Business NV. The bank consortium will arrange the facility with the backing of the Ministry of Finance. This is a good example of the export stimulating measures, which the banks have taken with the Dutch Government – even in the present economic circumstances – to support the Dutch exporters in the field of credit supply. First working capital facility handed over Atradius Dutch State Business NV, the executor of the Dutch Government’s Export Credit Insurance facilities, has handed out the first working capital financing facililty to Rabobank, which acts as agent and coordinator of this new financing agreement on behalf of IHC Merwede’s banking consortium. 1 Successful naming and launch ceremony for SEVEN PACIFIC The SEVEN PACIFIC, built for Subsea 7, was successfully named and launched on Saturday 20 March 2010 at Krimpen aan den IJssel, The Netherlands. The ceremony was conducted at the IHC Offshore & Marine division’s shipyard by Ann Clarkson, the wife of BP’s Senior Vice President, E&P Projects Execution, David Clarkson. The SEVEN PACIFIC is a state-of-the-art pipelaying and construction ice-class vessel, which is suitable for unrestricted operation worldwide. It is capable of installing flexible pipes and umbilicals in water up to 3,000 metres deep. The construction work has since been carried out at the IHC Offshore & Marine division’s facilities at Krimpen aan den IJssel. This is the fourth vessel contracted by Subsea 7 to the IHC Offshore & Marine division, the others being: the SEVEN OCEANS (pipelaying); the SEVEN SEAS (pipelaying and construction); and the SEVEN ATLANTIC (diving support). 2 IHC Merwede launches Chinese cutter suction dredgers in tandem IHC Merwede has simultaneously launched two IHC Beaver® 9029C cutter suction dredgers on Wednesday 24 March 2010. The vessels have been designed and built for one of the company’s large Chinese customers, Sinohydro, at Dutch shipyards by IHC Beaver Dredgers. ZHONG GUO SHUI DIAN J08 was named and launched at the Sliedrecht shipyard, while its sister ship, ZHONG GUO SHUI DIAN J09, was named and launched at the Hardinxveld-Giessendam shipyard. The ceremony signified IHC Merwede’s ability to supply these custom-built vessels to the Chinese market. It also exhibited the level of advanced technology at its disposal and the control it enjoys over the manufacturing and assembly processes at the locations of its various business units in The Netherlands. 3 4 IHC Merwede | Ports and Dredging | Summer 2010 1 2 3 5 IHC Merwede | Ports and Dredging | Summer 2010 6 IHC Merwede | Ports and Dredging | Summer 2010 5 4 April 2010 Naming and launch ceremony for ISANDLWANA Built for Transnet National Ports Authority (TNPA), based in South Africa, the naming and launch ceremony for the 4,200 cubic metres trailing suction hopper dredger ISANDLWANA took place on 14 April 2010 at the IHC Merwede shipyard, Verenigde Scheepswerf Heusden (VSH) in Heusden, The Netherlands. The ceremony was conducted by Mrs. Beatrice Nkayi, Executive Manager Ports & Corporate Affairs at TNPA. The construction of the ship will be completed at the IHC Merwede yard in Kinderdijk, The Netherlands. After the commissioning and dredging trials in The Netherlands, the ISANDLWANA will sail to her home port in Durban, South Africa to perform maintenance dredging works. 4 IHC Merwede achieves record revenue for 2009 IHC Merwede’s revenue increased to €1.13 billion in 2009 (€1.09 billion in 2008), with a net profit of €57 million (€76 million in 2008) over the same period. This record turnover was backed by a €1.8 billion order book at the end of 2008. The reduced level of profit compared to last year is predominantly explained by operational issues during the construction of a large custom-built vessel. The overall picture is one of a company in good financial health. May 2010 IHC Merwede makes major investment in new sustainable offshore technology IHC Hydrohammer®, market leader in the field of pile driving equipment, is continuing to make a major investment in sustainable and innovative solutions. It has invested a total of €37 million to expand its fleet of rental pile drivers as well as the further development and production of a revolutionary new design that will transform the market for ultra-deep water structures in the offshore oil and gas sectors: the IHC Waterhammer®, developed for use in deep water at depths up to 3,000 metres. It is controlled by a radically redesigned hydraulic system that uses sea water instead of oil. This addresses the practical issue of it being technically impossible to pump oil to and from such depths, while of course there is no shortage of sea water around the structure. There are also environmental benefits in that this solution removes the risk of accidental oil leaks. 5 7 IHC Merwede | Ports and Dredging | Summer 2010 I HC Merwede strengthens its leading position with The TT Pump Dredging Unit was specifically developed strategic acquisition of MMP in South Africa for use in small-scale dredging projects, including IHC Merwede has strengthened its position in the market maintenance activities, as well as environmental for deep-sea dredging and mining with the strategic projects, loading and unloading hopper barges and acquisition of MMP, which is based in Cape Town, South mining activities. The TT Pump Dredging Unit is provided Africa. The new name of the company will be IHC Marine as a complete package, allowing the user to start work and Mineral Projects (IHC MMP). immediately. The main advantage of renting the With 70 per cent of the Earth’s surface consisting of comprehensive TT Pump Dredging Unit is that it does not water, it is logical to assume that the future lies require any large capital investment and therefore underwater. That’s why IHC Merwede has combined all spreads the financial risk for customers. Another of its activities in this sector to create a new business advantage is that there is no need to pay maintenance or unit, IHC Deep Sea Dredging & Mining. repair costs. The compact TT Pump Dredging Unit is It will focus on excavation techniques in deep water available as a complete rental package and in four (up to 3,000 metres) as well as vertical transportation different configurations. Customers are offered the most from the sea bed to the surface. 6 suitable configuration for the scale of their dredging projects. IHC Lagersmit retrofits AVRA Shipping Group fleet The TT Pump has undergone a technical overhaul, and is IHC Lagersmit is appointed to retrofit the AVRA Shipping now more durable, maintenance-friendly and efficient in Group fleet of tug boats with a closed-oil, lubricated terms of mobility and operational use. 7 stern tube system. The system features SUPREME® seals and white metal bearing bushes and replaces the June 2010 previous open-water, lubricated stern tube system on HC Lagersmit’s new production facility opened in I AVRA’s vessels. IHC Lagersmit will assist AVRA with Alblasserdam overhauling and equipping its complete fleet of four IHC Lagersmit has opened a new manufacturing plant on ocean-going tug boats with the new components in 8 June in Alblasserdam, The Netherlands. The company 2010. Two new vessels will also be fitted with SUPREME® has decided to invest in the latest high-tech production seals. The new system will be quipped with SUPREME® facility for rotating shaft seals in western Europe, despite forward and aft seals. The 190 aft seal is made of bronze, the economically difficult times. is fitted with an extra sand barrier and runs on a regular, chrome steel liner. HC Merwede secures new orders worth more than I half-a-billion Euros HC Merwede and Wärtsilä join forces to extend the life I IHC Merwede is pleased to announce that it has recently of ships with Bolnes and Smit Bolnes engines secured assignments for dredging and offshore vessels IHC Parts & Services, part of Wärtsilä Netherlands (WNL) and equipment to the value of more than €500 million. have teamed up to provide life-cycle support for ships This reinforces the group’s belief that there will be with Bolnes and Smit Bolnes engines. The companies will continued demand for its innovative vessels, advanced combine their industry knowledge, expertise and strength equipment and life-cycle support. to maintain these dredging and other vessels worldwide in The latest projects agreed and confirmed by IHC order to extend product life cycles, reduce owners’ costs Merwede include three trailing suction hopper dredgers and meet the latest environmental legislation. Ships fitted (TSHD), one self-propelled cutter suction dredger and with Bolnes and Smit Bolnes engines are on average 30 four IHC Beaver® cutter dredgers. Furthermore, orders years old and over. The plants where these engines were were received by: IHC Hydrohammer® for six large built closed years ago. Therefore it is increasingly difficult Hydrohammers; IHC Handling Systems for various to find parts, yet there are still over 300 ships with (Smit) Internal Lifting Tools and an external pile gripper tool; Bolnes engines in operation. The most valuable IHC Hytop for the supply of several hydraulic jacking components of a dredging vessel are those that are systems and system packages; and IHC Deep Sea specifically used for dredging and the systems for Dredging & Mining for a fall pipe. propulsion and energy supply. As part of its cooperation IHC Merwede’s President Govert Hamers says, “These with Wärtsilä and IHC Parts & Services as a full service valuable new projects are in line with IHC Merwede’s provider, offers the complete upgrade solution for the outlook for 2010. The market which we operate in is ship, including dredging components and ship service. showing clear signs of recovery. In such a climate, it is Wärtsilä ensures total maintenance and upgrade packages reassuring to know that IHC Merwede’s reputation as the for the complete propulsion, including every part of the technology innovator remains intact and our customers engine and automation up to the propeller. recognise the reliability and efficiency of our products and services. With these assignments, IHC Merwede has I HC Parts & Services offers rental service for improved TT a strong work occupancy until 2012 and our flexibility Pump Dredging Unit allows us to take on even more work during that period.” IHC Parts & Services now offers dredging operators and utility and infrastructure engineering companies all over the world the opportunity to rent its improved TT Pump Dredging Unit. 8 IHC Merwede | Ports and Dredging | Summer 2010 6 7 9 IHC Merwede | Ports and Dredging | Summer 2010 A sight for sore eyes VOX MÁXIMA at work on Maasvlakte 2 1 10 IHC Merwede | Ports and Dredging | Summer 2010 1 The VOX MÁXIMA at work Introduction So, when the new ship was tendered and In January 2010, IHC Dredgers (based in ordered from IHC Merwede, the staff Kinderdijk) delivered the largest trailing teamed up with the yard’s specialists and suction hopper dredger (TSHD) ever built set up the knowledge cluster needed for in The Netherlands to Van Oord in the innovative design that Van Oord had Rotterdam (figure 1). The 31,200 cubic in mind. At that time, the sky seemed to metre VOX MÁXIMA went straight to be the limit for the global economy. work – and dealt with a few teething Dubai was buzzing with reclamation troubles – on what is currently Europe’s activity and other dredging markets largest land reclamation project, the were demanding more and more sand, Maasvlakte 2 expansion of the port of which had to be picked up further Rotterdam. Two established Dutch offshore and at greater depths. dredging contractors, Van Oord and This meant that the ship needed a large Boskalis, have formed a joint venture hopper, high-loaded speed and a large under the name PUMA to complete the suction depth capability, so that sand project. could be transported across large distances at the lowest possible price. Maasvlakte 2 is the largest ever reclamation project in The Netherlands. The deliberations resulted in a ship that Three hundred and sixty-five million would fit on IHC Dredger’s sheltered cubic metres of sand will be used to slipway. A diesel-electric dredging create an area of about 1,000 hectares installation was selected to maximise for the expansion of the port and other freedom of choice for the placement of industrial activities. The first phase of the the large dredge and jet pumps, with the project runs until 2013. It includes associated pipeline systems. To cope reclaiming 700 hectares of land for with the large suction depth and the container storage and distribution sites, huge amounts of sand, the suction pipe building 3.5 kilometres of quay walls, on the starboard side was equipped with 11 kilometres of sea defences, the a single-walled IHC dredge pump, driven infrastructure and deepening the port by a 6,000kW controllable electromotor. basins. The Port of Rotterdam Authority This pump is used for loading the is managing the project and it expects hopper, with the advantage that major economic benefits to be gained production is virtually unaffected by the from the expansion. Sustainability is also vacuum in the suction line. a major issue throughout the entire For discharging, two double-walled project. Maasvlakte 2 is expected to be IHC dredge pumps work in series: one is fully occupied by 2033. VOX MÁXIMA mounted in the pump room below the and about 20 other TSHDs belonging to hopper level; and the other is positioned the joint venture partners (figure 2) have on the port side of the foredeck, where brought large deposits of sand to the it is easily accessible for maintenance surface, including a world record of 3.8 and inspection. The 13,500 controllable million cubic metres in the last week of kilowatts of these pumps take the soil April 2010 (figure 3). mixture to a rainbow pipe and/or shore discharge coupling above the bows of A special design the ship. Of course, the ship can also Throughout the company’s history, Van discharge its load through two rows of Oord’s technical team has built up hydraulically operated bottom doors. enormous resources in terms of The two six-metre controllable pitch knowledge and experience relating to propellers in fixed nozzles give the ship a dredging and dredger operations. loaded speed of more than 17 knots. This 11 IHC Merwede | Ports and Dredging | Summer 2010 2 3 combination of main features matched three metres. Would larger bows and the next step was anything but routine. the design requirements and ensured gondolas break or collapse at the The Kinderdijk shipyard is located relatively low fuel consumption and intended scale? Nobody knew the alongside a traditional Dutch dike and it emissions. There was also a strong focus answer to that question. is adjacent to a UNESCO World Heritage on the availability and safety of the ship. site of 19 windmills (figure 4) that were The deck crane in particular, which can Another example: the mass of the single built in the 18th century and attract travel from the stern to the forecastle, suction pipe with an inlet diameter of thousands of tourists. However, the was designed for safe hoisting during 1,400 millimetres meant revolutionising infrastructure is simply inadequate for normal operations in swell, so that repair the design of winches, gantries and moving the 10,000 tonnes of steel – and and maintenance can take place while dynamic shock absorbers. And there was more – required for this vessel in the the ship is fully operational – without the still no proof that the new designs would required timeframe. So, the yard need to return to harbour. work in practice. On top of that, the developed a sophisticated approach to dynamic behaviour of a suction tube of construction, with the emphasis on This overall picture was familiar to the this size required a comprehensive moving steel across water, enhancing the IHC Merwede and Van Oord engineers. dynamic analysis – there was a serious building speed, increasing the limited The problem was the leap in scale possibility that the dangling pipe could capacity of cranes and spreading the compared to earlier vessels, even in severely damage the vessel’s hull. risks. comparison to Van Oord’s VOLVOX And finally, IHC Merwede has produced TERRANOVA, the largest Kinderdijk-built innumerable bottom doors and keelson The ship included more than 200 ship up to that point. For example, boxes in the past. The challenge now sections. Some of these were IHC Dredgers had developed a special was to keep them in line, flat and outsourced to other shipyards and bulbous bow and placed propellers in watertight, even with these sizes and assembled to form larger parts, known gondolas before. This arrangement unprecedented levels of hogging and as ‘blocks’. These were then moved to considerably improves the hydrodynamic sagging. heavy, remote-controlled trucks for profile of the ship and can reduce fuel transportation to pontoons that were costs and emissions by up to 30 per cent. Unique building approach towed over the river to the door of IHC These features were standard in the All the design issues were solved by Dredgers’ slipway hall. The trucks drove successful PALLIETER range, but those IHC Dredgers’ and Van Oord’s teams. off the pontoon slowly, aligning the TSHDs had a hopper capacity of 5,600 On 30 May 2008, the keel of the new blocks precisely with their counterparts cubic metres and propeller diameters of ship was laid. So far, so good, however, that were already on the slipway. 12 IHC Merwede | Ports and Dredging | Summer 2010 4 2 PRINS DER NEDERLANDEN and VOX MÁXIMA 3 The JV’s TSHDs brought 3.8 million cubic meters to the surface in only a week. The VOX MÁXIMA did her bit (courtesy PUMA). 4 The IHC Dredgers shipyard adjoins a UNESCO World Heritage site of 19 windmills (courtesy Stamsolve) 5 5 The giant gantries take the suction tube to the saddles safely Then, the welding started. This approach the hopper; the dredge pumps start the skills of the large building team and meant that just five weeks were needed running; and the self-emptying valves the professional production process. He for the assembly of almost 130 metres of are opened. On the bridge, we watch the points to two remarkable things about the ship . After this rapid operation, cross needle production indicator and the ship. First of all, its mass and cruise Her Royal Highness Princess Máxima of see incredible values for mixture velocity speed mean that a stop must be The Netherlands named and launched and density appear. We express disbelief, anticipated at a distance of about two the vessel on 24 April 2009. The process but the pipe operator just shrugs. And miles in advance. Reducing speed too of completion at the yard’s quay, basin indeed, in just one hour, 56,000 tonnes late makes the VOX MÁXIMA virtually trials, sea trials and the transfer of ‘our of dry solid sand are transferred to the uncontrollable. So, before operations princess’ to the owner, then followed. deposit site. The bow coupling is started, the navigators went through disconnected and the ship sails back to specific training on the simulator at the Working with the VOX MÁXIMA the loading site. Maritime Institute Willem Barentsz on How is she performing? For an answer to the Dutch island of Terschelling. Even so, that question, Ports and Dredging visited Captain Cor Schot (1958) joined the in practice... Secondly, the vessel is the VOX MÁXIMA after three months’ building team on the day the keel was relatively insensitive to heavy swell work on the Maasvlakte 2 project and laid. He started his career as a cutter because of its size. So, the crew has watched a full dredging cycle. The giant suction dredger (CSD) operator with learnt that the temptation is to carry on gantries release the suction tube to the HAM, one of the companies that make working for too long in severe bottom of the North Sea and the up what is now Van Oord. His natural conditions. That can result in enormous powerful submerged pump fills the talent was spotted and he worked his forces being exerted on the suction pipe. hopper with medium-class sand. With way up to Master of All Ships. He feels Now the crew has seen what can the same level of ease, the gantries honoured to be the captain of Van happen, they keep a much closer watch move the suction tube to the saddles Oord’s flagship vessel (figure 7). During on the barometer and the anemometer. safely after dredging (figure 5). Then the the building stage, he worked closely as ship sails to the discharge connection a member of Van Oord’s building team The captain told us that his work on the and the crew connect the floating with the IHC Merwede team, conducted building team involved working closely pipeline to the bow coupling quickly and numerous inspections and monitored with the IHC Merwede yard on the skilfully (figure 6). Now the true the commissioning process. He says that accessibility and safety of the ship and its spectacle begins: jet water nozzles the relatively short time needed to iron equipment. He guided us around the prepare a boiling ‘soup’ of the mixture in out the ship’s teething troubles is due to ship to show us how every item of 13 IHC Merwede | Ports and Dredging | Summer 2010 6 7 8 equipment, grease nipple and dangerous The bridge’s control consoles combine simultaneously driving both the place can be accessed from appropriate IHC Systems’ IHCS dredge control system propeller shafts at low speed and the stairs (figure 8) or platforms surrounded and Van Oord’s VODAS dredge main generators at high speed. by solid railings. Another example is the automation system. The joint venture seamless transition from the rope ladder has proved to be successful. It is easy to A sight for sore eyes to a fixed steel handrail. Cor Schot can operate, comprehensive and presents Wherever you are on the VOX MÁXIMA, take the credit for details like this. everything clearly (figure 9), giving the the main impression is one of space. She pipe operator just what he needs. is so large, and the diesel-electric design Working on board Duplicate displays on the navigator’s of the dredging installation saves so Our guided tour started on the bridge, stand and in the engine control room much space, that there is plenty of room where the results of the ergonomic pass on the information to the everywhere. The portside gangway study conducted by Van Oord in the appropriate crew members. resembles a footpath, the engine room pre-building stage can be seen at first looks like a ballroom, the workspace is hand. The recessed window to the aft of We can be brief about the remainder of spacious, and the stores and distribution the bridge gives the navigator an our tour. Of course, we walk past large rooms are the size of halls. And the crew unimpeded view of the entire aft ship, dredge and jet pumps, intricate gland love their ship. including the suction tube. The dredge pump circuits and MAN/B&W main You can sense it from the way they talk control stand, located opposite the diesel engines. Calmly thumping away, about it, but everything you see on the suction tube on the port side, provides they supply 28,000 kilowatts. There are ship confirms this: from the gangways to an excellent view of the gantries – the also: squealing hydraulic pumps; the stores, the engine room to the most critical components when loading impressive switchboards for the forecastle, the accommodation to the stops and starts. The navigator has a respective 6.6kV and 490V power tool boards in the workspace, cleanliness compact stand that provides all the generation and distribution; the battery and order prevail (figure 10). relevant navigational, nautical and of uninterrupted power supplies for the VOX MÁXIMA really is a sight for sore power information. many computers on board; and the eyes. And not just because she is only a ingenious and compact main gearboxes, few months old… The day before our 14 IHC Merwede | Ports and Dredging | Summer 2010 9 6 The crew connects the floating pipeline to the bow coupling quickly and safely 7 Captain Cor Schot feels honoured to be the captain of Van Oord’s flagship 8 Superb accessibility to every item of equipment 9 IHC Systems’ IHCS dredge control system and Van Oord’s VODAS dredge automation system: a successful ‘joint venture’ 10 10 Cleanliness and order show the love of the crew for their ‘princess’ visit, she had been rainbowing against the wind. When we arrived, the crew Principal features VOX MÁXIMA were hard at work cleaning her, and Built IHC Dredgers, Kinderdijk 2009 when we left, she was gleaming! Owner Van Oord NV Finally... Length overall (hull) 203m The VOX MÁXIMA is an appropriate, Length between perpendiculars 198m reliable, highly efficient and robust addition to the Van Oord fleet. She is the Breadth 31m result of excellent teamwork between a Moulded depth 17.5m top-class Dutch contractor and a Depth at maximum load 14.5m top-class Dutch shipbuilder, a gleaming asset in the spirit of that splendid Dutch Hopper capacity 31,200m3 tradition: a dredging industry, at the Maximum dredging depth 125m cutting edge of its field. Suction pipe diameter 1,300 and 1,400mm References Total installed power 31,272kW  Ports and Dredging 170. IHC Merwede, Speed, loaded 17 knots Sliedrecht, 2008. This article refers to the ship as Accommodation 46 persons the Vox Dubai, the name that was originally intended. The change was made after HRH Princess Máxima agreed to launch her. 15 IHC Merwede | Ports and Dredging | Summer 2010 Power girls Cutter suction dredgers for rock cutting 2 1 16 IHC Merwede | Ports and Dredging | Summer 2010 S 1 audian Huta Marine Works recently added AL SAKAB to its fleet, a dredger specially designed for the dredging of rock C 2 ollapse of tensile strength and breakdown of scales during rock dredging D 3 isplay showing cutter load during rock dredging IHC Merwede has built numerous cutter So, it is not sheer strength that defines suction dredgers (CSD). Every vessel is a rock. Unconfined compressive strength quality product in its own right, meeting (UCS) and tensile strength are the main all of the rules for design and function as parameters here, along with other set by the industry . factors like rock quality designation (RQD), layering and origin. Cutter dredgers can be used for a wide Unfortunately, most rock samples are range of dredging projects. They reclaim mainly assessed using UCS and the other land from the sea, dredge entrance parameters are often unavailable. The channels and create or extend harbours table shows the usual rock classification. by removing soil from land. They are also used to clean up pollution and silt from Rock classification UCS [MPa] rivers, lakes and canals. So, CSDs are Very weak 1.25 or less found in a variety of shapes and sizes: Weak 1.25-5 from small to large, standardised to custom-built, and stationary to Moderately weak 5-12.5 self-propelled. Moderately strong 12.5-50 Strong 50-100 Many dredgers are designed to maximise availability. However, it sometimes Very strong 100-200 makes sense to specialise. In the heavy Extremely strong 200 or more mineral mining industry, for example, dredging conditions will not vary dramatically, because the operating area Rock cutting: CSD design rules and will remain the same for many years. considerations Similarly, contractors who always On general-purpose CSDs, the relation operate in a limited geographical area between required power and defined will probably see less varied dredging production, as well as the ratio between conditions. Dredging in the Middle East, pump and cutter power, are determined for instance, always means a high by the soil characteristics. In loosely proportion of dredging in rock and packed sand, pump power – rather than cemented soils. Dredging in rock is cutter power – determines production. probably the most demanding type of In hard-packed sand and stiff clay, dredging. This article examines how the however, full cutting power may be design of CSDs for rock dredging involves needed to achieve the desired level of much more than installing a cutter head production. So, the pump power/cutter with pick points and high-installed power ratio is a measure for production power. performance in different soils, together with the transportation distance. Cutting rock Rock is a brittle material. So, the normal By contrast, CSDs that cut rock physical design parameters for cutting repeatedly carve and break down rock tools working with ductile materials – scales, generating repeated peaks and like stiff clay – don’t apply. Cutting rock is sharp falls in cutting forces. This results not cutting in the normal sense of the in a relatively low average cutter load. word; it is more like continuous carving. The peaks in the forces must be When cutter teeth touch rock, they don’t absorbed by the cutter drive, which penetrate as they would with sand or therefore needs a considerable torque 3 clay. After repeated contact, tensile and power reserve above the nominal strength suddenly collapses and a small design value (figure 3). or a large section breaks down (figure 2). 17 IHC Merwede | Ports and Dredging | Summer 2010 There are additional implications: (ACC) results in considerable dampening L 4 adders for rock-cutting CSDs are carefully calculated with FEM • More than when dredging sand or clay, of cutter force peaks and overshoot. cutter power determines production. The dredge pumps and associated A 5 LBZEM: note the relatively heavy, box-shaped cutter ladder and the long cutter shaft So, rock CSDs are usually equipped gearboxes for the rock CSDs must be with high-powered cutters, both in heavy-duty. This is a result of the T 6 he SAMSUNG NEW PIONEER, an example of a multi-purpose CSD absolute terms and in relation to the intermittent variable loads linked to rock pump power, as the table in the ‘vessel scales of different dimensions and overview’ section shows. quality. For the same reason, the sphere • The cutter head must be electrically passage in the dredge pump impellers driven because hydraulic cutter drives needs to be as large as possible. The have no peak load reserves. If gear- Cutter Special® pump was developed boxes are applied, they must be specially for this purpose. It combines a heavy duty. large sphere passage with good suction • A long cutter shaft is required to properties and high efficiency. ‘elasticise’ peaks using the natural torsion of the shaft. The spud and spud carrier mechanism • The cutter bearing should not be a must be sturdier than is usual on CSDs in roller or plain metal type, but a rubber order to handle the large reaction forces bush bearing, flushed and ‘lubricated’ and force peaks generated by cutting with water to prevent damage and to rock. dampen vibrations. Finally, the high level of vibration and Of course, on general-purpose CSDs, the variations in force mean that the maximum vertical ladder reaction force superstructure, accommodation and needs to provide ample counterbalance machinery on rock CSDs must be more for nominal cutting forces, including carefully designed to prevent vibration, dynamic effects. For CSDs cutting rock, noise and metal fatigue than on this requirement is even more important ‘standard’ CSDs. IHC Merwede’s to cope with the large reaction forces that experience and integrated design can be directed upwards as a approach can help to attain these goals. consequence of the repeated bouncing of the cutter teeth against the rock material. Vessel overview The cutter ladder also needs to be heavy The table below compares the installed and box-shaped, so that it presses the pump power in a selection of CSDs built cutter against the rock at all times. over the past 15 years to the installed Ladders for dredgers of this kind are cutter power. It is then possible to make carefully calculated using the finite some broad conclusions. 5 element method (FEM) and, if necessary, reinforced with thicker and/or high- Pump power Cutter power Ratio pump/ Vessel Owner Year [kW] [kW] cutter power tensile steel (figure 4). The strength of the ladder has of course to be mirrored by ALBZEM EDC, UAE 2007 1,825 1,100 1.66 the quality and strength of the ladder trunnions, as well as by the construction JFJ DE NUL J De Nul 2003 15,800 6,000 2.63 and execution of the spuds and spud D’ARTAGNAN DEME 2005 15,400 4,400 3.50 carrier, which exert the huge forces to the sea floor (figure 5). AL MIRFA NMDC 2000 6,380 1,500 4.25 The swing winches on a CSD cutting rock AL SADR NMDC 1999 10,600 2,200 4.82 and the associated gearboxes differ from general-purpose CSDs, because they have MASSHOUR SCA, Egypt 1996 13,200 2,400 5.50 to handle the variable cutting forces and BEAVER 9029C Sinohydro 2010 8,900 1,500 5,93 force peaks. So, they need almost the same relative torque and power reserves AL SAKAB Huta Marine 2010 15,700 2,600 6.04 as the cutter drive, but in four-quadrant Works operation. Ideally, they can be driven SAMSUNG NEW Samsung E&C 1996 8,910 1,050 8.49 using constant torque. This new feature in PIONEER the latest IHC Systems’ artificial IHC 8527MP® Chinese owners 2010 9,400 1,100 8.55 intelligence automatic cutter controller 18 IHC Merwede | Ports and Dredging | Summer 2010 It is no surprise that CSDs designed for rock cutting, particularly the ALBZEM and following vessels, have a small pump-to-cutter power ratio. It is equally unsurprising that these dredgers are mainly operated by contractors working in the Middle East, where rocky beds are the predominant feature of their backyard. Of course, the Belgian operators with the two most powerful players in the game – JFJ DE NUL and D’ARTAGNAN – wanted to be prepared for Middle East dredging and so they made sure that they had excellent rock dredging properties. This table shows that the two dredgers at 4 the other end of the spectrum, the SAMSUNG NEW PIONEER and the IHC 8527MP®, are more multi- purpose CSDs, even though their cutter power is not exactly low. However, it is clear that continuous dredge rocking is not their forte. Even so, even at Ports and Dredging, it is surprising that the very last number in the table betrays the design purpose of the IHC 8527MP® – transporting large amounts of sand over long distances! Finally... Each CSD leaving an IHC Merwede shipyard meets all the design criteria in its own way, after careful tailoring to the specific requirements of its new owner. However, as we have seen, it takes more than a cutter head with pick points and impressive nominal power on the cutter to make a rock dredger from a CSD. A number of possibilities, drive alternatives and design standards have to be taken into account to arrive at a carefully balanced design that can manage the extreme conditions associated with cutting rock. IHC Merwede has acquired a treasure trove of experience with these design criteria and the practical and technical subtleties of building and operating cutter dredgers. Roughly 50 per cent of the cutter dredgers in the world come from IHC Merwede. As you read this, more than ten CSDs will be under construction or on order. Eight of them will be general-purpose, high-production dredging vessels. The other two are heavy self-propelled cutter dredgers. The D’ARTAGNAN and the JFJ DE NUL can look forward to some challenging company! References  ‘Functional requirements of cutter dredgers’. Ports and Dredging 147. IHC Holland, Sliedrecht, 1996. 6 19 IHC Merwede | Ports and Dredging | Summer 2010 SEVEN ATLANTIC commissioned IHC Offshore & Marine builds unique Diving Support Vessel (DSV) 20 IHC Merwede | Ports and Dredging | Summer 2010 1 1 The SEVEN ATLANTIC during her sea trials Customer IHC Offshore & Marine focuses on large, The SEVEN ATLANTIC (figure 1) recently custom-built, specialised and high-end went into service for Subsea7 in the offshore vessels. North Sea. Subsea7 is one of the world’s leading subsea engineering and IHC Offshore & Marine places a strong construction companies, servicing the oil emphasis on its primary process. With and gas industry. Its skilled and custom-built vessels for different niche experienced international workforce, in markets, the only repetitive factor is the excess of 5,000 personnel, supports its process itself. Building a complex onshore and offshore operations in custom-built vessel involves a high Africa, Asia Pacific, Brazil, North America degree of specific knowledge, but it is and the North Sea. not always possible – or desirable – to retain all of this in-house. The primary Subsea7 has a strong focus on the process starts with the design stage, growing high-tech and valuable before the contract is signed. deepwater subsea umbilical, riser and flow line markets in Africa, Asia Pacific, Functional requirements Brazil and the Gulf of Mexico, and at the Subsea7’s decision to select IHC Offshore same time retains a leading role in the & Marine after a rigorous tender process North Sea. It is respected globally for its made perfect sense. From the beginning, excellent project management and there were new market trends and execution capabilities, and a strong requirements that needed to be emphasis on safety. It offers the full addressed. In recent years, the need for spectrum of products and services to more efficient, cost-effective and deliver Subsea Field Developments and versatile offshore vessels has increased. Life-of-Field (LoF) services to customers. In addition, the most complete support package for construction, inspection, Subsea7 has a fleet of over 20 world- maintenance and production in oil and class pipelay, construction, remotely gas fields is required. Fully integrated, operated vehicle and diving support well-balanced and reliable multi-purpose vessels. In recent years, the fleet has offshore vessels are the appropriate undergone a capital investment response. programme to the value of more than $1billion to upgrade and expand its Subsea7 set out several challenging capability and capacity, and in particular performance criteria for the vessel: to serve deepwater markets. In addition, • Operation in the North Sea without its offshore operations are supported by resupply for 60 days a number of global pipeline fabrication • A clear aft-deck area of 1,200 square and logistics bases, such as the recently metres opened pipeline fabrication spool base • The ability to carry 3,000 tonnes of at Port Isabel in the Gulf of Mexico. deck cargo • Heave compensation and station- Builder keeping suitable for working in seas of IHC Offshore & Marine has outstanding 4.5-metre Hs resources and facilities for designing and • A saturation diving complex for constructing vessels using innovative 24 divers concepts and modern engineering • A self-contained treatment system techniques, whether they are one-off and storage capacity for subsea oil ships or limited series. This is confirmed and gas wells by a distinguished track record of highly • Outstanding station-keeping features. distinctive designs. 21 IHC Merwede | Ports and Dredging | Summer 2010 2 3 These requirements meant that the Intermezzo: deep-sea diving to ensure that they remain saturated vessel needed a large tank capacity, a Saturation divers generally work at water and are protected against hypothermia. large internal volume for the diving units depths of more than 50 metres, and In short, the whole complex of and storage, high-pressure pumps and when working at those pressures must pressurised chambers and artificial outstanding stability. live within a ‘saturation diving chamber’ breathing allows the divers to operate in when onboard the diving support vessel. shifts, take time off and sleep without Approach The saturation divers breathe a special the need to decompress. Subsea7 was one of the prominent mix of helium and oxygen in the knowledge partners in the development chamber that has been carefully Vessel of the SEVEN ATLANTIC. Subsea7 balanced to suit the respective water The SEVEN ATLANTIC was built as a DPIII- designers cooperated closely with depth and pressure that they will be classified vessel in accordance with the IHC Merwede’s Offshore & Marine working at. This prevents them from Rules and Regulations of Lloyd’s Register. division and the dive spread suffering the serious effects of It was given the following notation: manufacturer. Integrated partnership and decompression. Vital safety standards “Lloyd’s Register of Shipping ✠100A1, collaboration require trust, commercial imply greater complexity and more Diving Support Vessel, UD strength for and technical transparency, a match of measures to safeguard the availability of load of 10t/m², Helicopter Landing Area, cultures and a shared goal. The yard, in its this saturation diving complex, as will be ✠LMC, UMS, DP(AAA), CAC(2), EP, ICC.” role of system integrator, takes vigorous detailed below. The vessel also complies with the action to ensure that these conditions are regulations of the Isle of Man fulfilled – integration always implies The artificial breathing mixture replaces authorities. It is a fully dynamic equality between all parties irrespective nitrogen in normal breathing air with positioned diving support/offshore of the company, knowledge or revenue. helium. The oxygen percentage in the construction vessel, suitable for Therefore, terms incompatible with mixture of oxygen and helium (heliox) unrestricted worldwide operations. equality – like ‘sub-contractor’ and can be adjusted to the depth of the dive. It has been specifically designed for ‘principal contractor’ – are abandoned. This artificial gas saturates the diver saturation and air diving support work in The idea is to bring knowledge partners during his period under pressure. environmental conditions, which many closer together, allowing the creation and existing similar vessels are unable to preservation of a tightly-knit team during A diving bell (figure 2) takes the divers to cope with. all phases of the project, resulting in an the working depth. It has a launch and optimal team effort. Of course, recovery connection and an umbilical The vessel was designed with the communication is the vital element in this connection to the ship. The umbilical required redundancy of all DP, process. feeds hot water and heliox to the divers propulsion, and manoeuvring-related 22 IHC Merwede | Ports and Dredging | Summer 2010 2 Diving bell interior 3 Three azimuth- type main thrusters 4 The sleeping compartment in 4 the saturation chambers systems. The integrated saturation the forward part of the vessel and one volume of seven cubic metres, take the diving twin-bell system has a capacity for transverse thruster has been installed in divers to the subsea work site. The diving 24 divers at a maximum operating depth a tunnel forward. As a result, no single bells are deployed through moon pools of 350 metres. It provides the divers with failure – including the loss of any located amidships, minimising the effect advanced levels of comfort and safety individual compartment due to fire or of ship-induced motion on bell standards. The ship also has: flooding – can interfere with the vessel’s operations. The launch and recovery an internally mounted well-treatment position-keeping capability. system spans multiple decks in the system; two observation class ROVs; a superstructure and includes four 120-tonne heave-compensated offshore Diving installation’s integration electrically driven winches per bell, plus crane; facilities for a complement of 150 The integrated saturated diving system is a heave compensation gantry system (not including divers); a clear working located amidships and can accommodate and a bell handling trolley system for deck area of 1,200 square metres; and 24 divers (eight teams of three). manipulating the recovered diving bell to the service provisions for work-class ROV The system is suitable for operations in a side mating position with the connections (and others). Twin-air water depths of up to 350 metres. The saturation chamber complex. stations for dives with a limited depth 24-person saturation chamber complex The SEVEN ATLANTIC has very large and twin observation-class ROV occupies a superstructure compartment storage capacity for diver breathing gases, deployment systems have been spanning the full width of the ship. a gas and air management system, an integrated into the vessel. The SEVEN It complies with Norwegian NORSOK atmospheric treatment system and a ATLANTIC can also carry a 3,000-tonne requirements and provides exceptional dive-and-chamber control room. The carousel and a 12-metre air-diving improvements in living conditions for the ultra-modern saturation and dive control daughter craft on the aft deck. divers (figure 4). The chambers have an system is one of the first in the world that external diameter of approximately no longer works with manually operated The layout of the 6.6kV integrated 2.45 metres. Two transversely located valves – it is an entirely PLC/SCADA electric power generation and and pressurised transfer chambers allow controlled dive-by-wire system. propulsion system is for DP3. This implies access to the diving bells without redundancy and the total separation of disturbing the other divers. The living The integration of this dive installation any thruster installation, minimising the chambers are arranged longitudinally in is a fantastic achievement by IHC risk of fire or flooding. The main the ship and consist of four three-man Merwede’s Offshore & Marine division. propulsion system comprises of three and two six-man twin-lock chambers. Everything depends on the volatility of electrically driven fixed pitch propellers There are two 18-man hyperbaric the heliox-breathing mixture. Helium gas in azimuth nozzles aft (figure 3). There lifeboats connected to the system. molecules are so small that normal are two retractable azimuth thrusters in Two diving bells, measuring an internal industrial pipe couplings and rubber 23 IHC Merwede | Ports and Dredging | Summer 2010 5 hoses – which are perfectly sealed for From the bridge... to complete work faster than many water, air and oil – leak heliox. So, all the The SEVEN ATLANTIC has been working comparable vessels. We look forward to connections from the heliox tank and in the southern sector of the British part working with Shell, and our other clients preparation unit had to be designed with of the North Sea for Shell, as well as who will utilise this vessel, in the safe adapted couplings, expansion pieces and completing various inspection jobs in the and timely delivery of the various work without any hoses. Any tension in the Dutch sector, since commencing work on scopes it will undertake over the next pipes and connections must be avoided. 26 March 2010. The vessel has few years.” This results in a maximum tolerance for completed over 100 saturation dives and main-deck diagonal strain-induced over ten surface (air) dives as part of its Ports and Dredging spoke to Paul deformation of only 1.5 millimetres! first work scope. Squance, one of the SEVEN ATLANTIC’s The SEVEN ATLANTIC is being utilised to captains. He explained that, in the few Finite element method (FEM) service the long-term underwater months it has been in operation, the calculations were used to obtain this and services contract Subsea7 holds with vessel has completed several jobs in the the huge saturation chambers were Shell Entities, operating in Europe, for North Sea (figure 5). In most cases, these placed on sleeve pieces. So, there is no inspection, repair and maintenance have required the simultaneous tension or strain at all on any breathing programmes. It is also being used for deployment of all of the vessel’s mixture connection in the vessel’s some of Shell’s capital projects and equipment: diving bells, main crane, specified working conditions (these are decommissioning works across its auxiliary cranes, A-frames, ROVs and so tailored to a significant wave height of offshore fields and facilities. on. The Captain says that the ship is 4.5 metres). Steph McNeill, Vice President for Subsea7’s unique in the world – a five-star vessel UK region, commented: “Everyone is for working, accommodation and diving. Subsea7 and IHC Offshore & Marine very pleased with the SEVEN ATLANTIC’s He and his crew love the design. They invested heavily in the failure mode and performance so far. The vessel was built think that it is entirely fit for the purpose effect analysis (FMEA), and a test to have an exceptionally good sea- for which it was intended, allowing them programme lasting several months. keeping capability and has already to perform any diving job imaginable Quality and safety were given priority successfully demonstrated this by and giving them the facilities to work for above delivery time to maximise the holding station, landing helicopters and up to 60 days offshore without resupply. reliability, availability, maintainability and continuing to work in the extreme sea With its superior station-keeping safety of the ship and its crew. conditions experienced on its first performance in extreme weather project. It is built and equipped for at conditions, the vessel is capable of least 60 days at-sea endurance and is supporting operations throughout the demonstrating its ability and efficiencies year. With its large deck, state-of-the-art 24 IHC Merwede | Ports and Dredging | Summer 2010 5 The SEVEN ATLANTIC at work (courtesy Subsea7) 6 The innovative dive control 6 system is the first of its kind in the world diving systems, integrated support ATLANTIC effectively represents one of It proves once again that IHC Merwede equipment and high levels of the first of a new generation of ships. Offshore & Marine division’s customers redundancy, the vessel has been It is more technically advanced and really do receive value for money, not designed to maximise productive time in capable than many similar vessels in the only in the building stage, but also the field and the efficiency of working market and leading the way in improving throughout the lifetime of the vessels. campaigns. The vessel further enhances the efficiency of subsea operations. Subsea7’s ongoing commitment to ensure safe and timely project delivery Principal features SEVEN ATLANTIC for its clients. Commissioned IHC Offshore & Marine B.V. 2010 The Captain, who was a member of the Type Diving Support/Offshore Construction building team and worked together with Vessel the IHC Merwede team to meet the Length overall (hull) 144.79m challenge of delivering the ship, is highly Length between PP on design draught 128.96m enthusiastic about the reliability and maintainability of the vessel. He recalls Breadth moulded 26.00m that it was tested more intensively than Depth main deck moulded 12.00m any previous ocean-going vessel and so Draught design moulded 7.00m has operated without any failure or interruption from day one. He believes Draught scantling moulded 8.00m that the joint IHC Merwede and Subsea7 Deadweight all told at design draught Approx. 8,700 tonnes teams have done an extraordinary job. Deadweight all told at scantling draught Approx. 11,000 tonnes Conclusion Deck area 1,200m2 The introduction of this DSV to the Offshore crane 120t @ 15m SWL market has provided Subsea7 with one Diving capacity 24-man saturation diving system, rated of the most versatile and advanced at 350 metres diving vessels currently available. Suitable for unrestricted worldwide Total installed diesel-electric power 20,160kW operation and specifically designed for Economical speed 13.6+ knots saturation and air diving support Accommodation 150 people operations in the North Sea, the SEVEN 25 IHC Merwede | Ports and Dredging | Summer 2010 Fixing up a casualty of war IHC Parts & Services Europe renovates severely damaged Beaver dredger 1 26 IHC Merwede | Ports and Dredging | Summer 2010 1 A late and distorted casualty of World War II The explosion possibly even more severe. The blow to During the night of Saturday 10 October the ladder and shock wave had 2009, a three-year-old IHC Beaver® propagated both mechanically and 6522C, with the rather unimaginative hydraulically along the pumping line and name of M30, was calmly working lifted up the engine pontoon. The through layer after layer of soil in the lively bearings of the swivelling gearbox for the harbour of Wilhelmshaven, Germany. dredge pump were damaged, the pump Suddenly, the two crew members saw a diesel engine had been torn off its dazzling green/white flash and... then silencers and the dredge pump housing nothing. They had been knocked out cold was broken into several pieces – not to and didn’t even hear the bang or see the mention the minor damage! As one of the fountain of water that alarmed fellow owner’s inspectors joked: “Such quality workers in the vicinity. They recovered after 65 years of rusting – it must have after some treatment, thankfully without been a German mine!” any lasting harm. Owner The same can’t be said for the ship. The owner of the unfortunate dredger is It looks as if the cutter head hit a mine Josef Möbius Bau-Aktiengesellschaft. The dating back to the Second World War, Hamburg-based company is a successful when the port of Wilhelmshaven was not operator in dredging and construction for just a lively marine base, but also a rivers and dikes, ports, roadways, tunnels favourite target for the Allies. The mine and airports. Möbius specialises in did exactly what its makers intended, challenging and complex projects, and it blasting the ladder and the front of the has the required in-house capabilities and dredger out of the water. project management skills. In September 2007, STRABAG SE acquired a major In the aftermath, technical inspectors interest in Josef Möbius AG, with the were hastily called in from the owner and leading German ‘wet’ construction firm IHC Parts & Services’ RIO Europe. The complementing STRABAG’s capacity in dredger was severely damaged. The front ‘dry’ construction work. Möbius can draw of the pontoons had suffered typical mine on a fleet of four trailing suction hopper damage. As the vessel smashed back into dredgers (TSHD) – with two new vessels the water, the resultant forces had under construction – five cutter suction pressed the steel plating inwards to form dredgers (CSD), two booster stations and hollow squares between the frame webs. the necessary auxiliary craft. There are The damage to the robust cutter ladder also a number of large ‘wet’ and ‘dry’ was more obvious – the lower section was excavators. Dedicated vehicles for dry one metre out of position, rendering it construction do the work onshore. useless. The cutter head and cutter shaft had vanished, and the cutter shield was in The firm has achieved ISO 9001 a strange position (figure 1). One of the certification and assembled a small, yet ladder trunnions had also been moved outstanding technical team that maintains out of position and even the spud carrier the fleet and designs, manufactures and cylinder had been distorted. The operator tests bespoke equipment. They had the cabin had broken off the swing absorbers expertise to realign the M30’s distorted and moved about 40 centimetres (figure 2). spud poles. On the outside… so far, so bad. Möbius and IHC Merwede are old An extensive inspection of the inside of acquaintances, but not for floating the dredger identified damage that was dredgers as the M30 is its only IHC-built 27 IHC Merwede | Ports and Dredging | Summer 2010 2 3 2 The operator cabin, torn off and dropped 4 A replacement makes sense 40 centimetres from its original position T 5 he IHC Beavers’ modular structure protects 3 In Kinderdijk them from exploding ammunition 6 Restored to her former glory dredger. However, over the years Möbius To guarantee optimal life-cycle support for Ron Verschoor and Engineer Nico van has equipped many of its excavators with its customers, IHC Parts & Services Leeuwen joined forces and worked IHC Systems’ advanced eXcavator Position operates close to their sites. intensively with IHC Beaver Dredgers, Monitor (XPM) and actually helped to IHC Parts & Services Fabrication, push this IHC Merwede business unit to One of the RIOs is IHC Parts & Services IHC Merwede Repair and OEM suppliers. extend its knowledge and expertise. Only Europe (RIO Europe), which shares The first step was to position the entire a few months ago, IHC Systems installed premises with Merwede Ship Repair in dredger on the large vessel lift at the world’s first high-tech, artificial Hardinxveld Giessendam. A 24/7 support IHC Beaver Dredgers for a complete intelligence-based Automatic eXcavator service is available for emergency repairs inspection, clearly exposing the damage Controller (AXC) on a mighty Liebherr 994 and/or rapid solutions for engineering to the front of the side pontoons. machine. This automated system allows issues. Questions about spare parts excavators to cut a pre-defined profile deliveries also come in through RIO The journey continued to Kinderdijk, from a given area and load the excavated Europe. There are in-house repair where the large hall of IHC Parts & material into barges – precisely and facilities, ensuring direct control over Services Fabrication was used to break up automatically – just like a CNC machine emergency repairs. the dredger into parts. As regular readers cuts shapes from metal. The aim is to RIO Europe also acts as a front office for may recall, this is a straightforward job boost production figures in homogenous other IHC Merwede-related questions. thanks to the vessel’s modular soil types. In a later issue of Ports and construction. The pontoons were towed Dredging, we will be exploring this subject The road to recovery to IHC Merwede Repair to repair the again with Josef Möbius. RIO Europe made a thorough analysis of damage to the front. Bureau Veritas the possible far-reaching consequences of carried out the inspection and a new IHC Parts & Services RIO Europe the visible damage to the M30 and approval certificate was issued for IHC specialists are located all around the submitted a tender to Möbius. operations in coastal waters. In the world in Regional IHC Organisations (RIO), The German company accepted the meantime, the ladder winch was sent to with six currently in operation. The offices tender and awarded the job to IHC IHC Hytop for preventive testing and the are located in Singapore, China, Dubai, Merwede. The job read: “Completely combined velocity/density transmitter India, The Netherlands and Nigeria. repair and commission the M30 until she found its way to IHC Systems for the Efficient dredger operations require complies with the original specification.” replacement of its lining of extremely different approaches during the life cycle After some delays, the dredger arrived in wear-resistant aluminium oxide tiles, and of a vessel. IHC Parts & Services provides Kinderdijk (figure 3) in the first week of testing the safety and alignment of the solutions for all these stages under the February and the scheduled completion sealed radioactive source. banner of IHC Life Cycle Support. and delivery was for the first half of June. It consists of maintenance engineering, The repair work carried out on the ladder docking and ship repair, renovation, As a one-stop shop, RIO Europe can was a major job. The construction is too component repair, field services, dredging draw on the resources of the whole strong to be realigned mechanically and consultancy and dredger management. IHC Merwede group. So, Project Manager so an ingenious solution was found – the 28 IHC Merwede | Ports and Dredging | Summer 2010 4 5 6 production of an intermediate piece to In the second week of June, the IHC Beaver® contributes to this compensate for the deviation. The newly overhauled dredger was reassembled, invulnerability (figure 6). The modules manufactured lower ladder section also recommissioned (figure 5) and towed are connected by a number of pins and eliminates any deviation. In addition, the across the North Sea to the relieved drawbars that act like breaker bolts and ladder trunnions were loosened, realigned owner, ready to resume operations in the protect the structure and seaworthiness and stiffened once again. Later, when the JadeWeserPort at Wilhelmshaven. of the ship. So, IHC Merwede has a new rest of the job had been completed, the and unexpected unique selling point! ladder was replaced on its hinges. Conclusions Repeated and precise 3D measurements Although this was not a consideration in Finally, this case has again proved that the followed as the ladder was aligned to the design phase, it is remarkable that IHC Merwede RIO network, which is only comply with the original specification, IHC Beavers are relatively invulnerable to a few years old, has matured and is able to ensuring that the vessel would dredge such fierce explosions. There are examples cope with versatile projects. So, customers accurately again. of comparable CSDs sinking after are advised to go to one of the RIOs when ammunition explosions and this remains unexpected problems occur. There, they The submerged dredge pump was a lost a risk with many dredging operations will find a one-stop shop geared towards cause (figure 4) and the entire unit was despite all the preventive magnetic solving their problems and getting round replaced, including the pedestal and surveys and measures. It has emerged the need to contact a host of suppliers. bearings. As for the machinery, all the that the modular arrangement of the gearboxes were carefully inspected, overhauled and examined under load by Principal features M30 the OEM. Fortunately, the damage was Built IHC Beaver Dredgers, 2007 not as extensive as expected. In contrast, Type IHC Beaver® 6522C there were odd wear patterns in the diesel engines and so they had to be Owner Joseph Möbius Bau-Aktiengesellschaft totally disassembled, reassembled and Length overall 64.90/73.60/80.70m overhauled. They were then tested at full Length of pontoon 48.00m load and found to comply with the original specification. To avoid unwanted increases Breadth 12.44m in vibration levels, a host of other Average draught 2.97m machinery was inspected, aligned and Dredging depth with cutter max. 22.00m renewed, including shafts, couplings, pins and wire sheaves. And last but not least, Dredging depth deep suction installation max. 30.00/35.00m the operator cabin was returned to its Discharge pipe diameter 650mm original position. Cutter power 585kW Total installed power 2,889kW 29 IHC Merwede | Ports and Dredging | Summer 2010 Powerful Chinese CSDs working successfully IHC 8527MP® goes into service 2 30 IHC Merwede | Ports and Dredging | Summer 2010 1 D 1 emonstrating the features for independent operation, the first IHC 8527MP® during basin trials 2 Dalian Liaonan Shipyard 3 Easily serviceable dredge pumps with fully exchangeable wear parts are characteristic of recent IHC Merwede-quality dredgers Introduction The final mix was a constructive solution It is not long since IHC Merwede providing Chinese dredging contractors developed a sophisticated approach to with low costs of ownership and allowing satisfy the typical operational the shipyards to increase turnover and requirements of the Chinese dredging Chinese content. The local parties also market and its huge demand for new acquire experience by building hulls and equipment. By this method, Chinese accommodation for dredgers, and shipyards team up with IHC Merwede to supplying engine room equipment such build standardised cutter suction as diesel engines, generators and auxiliary dredgers (CSD). The quality of the components. dredgers is safeguarded by the role of IHC Merwede in supplying design, crucial IHC Merwede delivers the elements of parts and subsystems, building design, drawings, essential dredging- supervision, commissioning and financial related components, building supervision support . Dalian Liaonan Shipyard and commissioning. Some of the essential (figure 2) in the Chinese province of components are produced at IHC Merwede Liaoning emerged as the main partner in locations in The Netherlands, China this long-term pooling of resources. (Guangzhou) or elsewhere. Other items are produced at Chinese factories In general terms, typical ‘Chinese’ CSDs appointed by IHC Merwede as trusted must be powerful, versatile and sturdy, suppliers. There are also extensive and they are expected to cope with long services available from the Regional discharge distances. They often have to IHC Organisations (RIOs) in China. operate in remote areas and this implies a IHC Engineering Services in Kinderdijk high degree of autonomy. These demands – which coordinates the process – calls it are apparent in the design. The vessels ‘new building in cooperation’ (figure 4). have anchor booms, extensive accommodation and spud tilting facilities. The origin of the ‘Chinese’ CSD line They can replace the cutter head with a The programme’s success for all parties dredging wheel for operations in tough started with the emergence of the soils. Essential components are highly IHC 7025MP®, a CSD with installed power wear-resistant and interchanges on and of 5,575kW, a discharge pipeline diameter between ships are fast and easy – of 70 centimetres, a suction depth of reducing the cost of ownership (figure 3). 25 metres, accommodation for 12 people There is extensive standardisation and and, of course, anchor booms. In no time, the emphasis is on durability, optimised 22 of them were under contract for stock levels and uptime. Chinese contractors and most of them are already in service on various projects. The Chinese market also requires a careful balance between customer needs, The birth of the IHC 8527MP® government policies and economic The outstanding efficiency of these ‘small’ constraints. Other factors include IHC 7025MPs closely paralleled increasing IHC Merwede’s ambitions to be ‘the demand for greater dredging capacity and technology innovator’ and the market longer discharge distances. leader in dredging-related ship and So IHC Merwede developed a medium- equipment construction, and the Chinese sized CSD with installed power of more than ambition to gradually develop dredging 13,000kW, a maximum dredging depth 3 knowledge and craftsmanship. of 27 metres and a delivery pipe diameter 31 IHC Merwede | Ports and Dredging | Summer 2010 of 85 centimetres. This IHC 8527MP® domestic coal transportation and it multifunctional and versatile. With only (figure 1) boasts a design that combines recently branched out into dredger some small adaptations, the dredger can functionality and patented aesthetics. operations. Four IHC 7025MP® CSDs have even handle muddy soil, achieving The fully electric winches and cutter drive provided the benchmark for its dredging production figures of about 70,000 cubic cope efficiently with the larger loads. fleet until now and their success inspired metres per day in situ. To manage the As well as a submerged dredge pump, G&H Shunhang to order no fewer than six swell conditions, IHC Merwede is two inboard dredge pumps help to attain IHC 8527MP® dredgers! investigating whether a standard production figures as high as 3,000 cubic conversion kit can be designed to equip metres per hour in situ with a delivery The first job of the GANGHAI JUN 516 was the dredger with a flexible spud carrier length of approximately 12,000 metres. near the port of Shantou, a city of about similar to those developed for the IHC Amazingly – and this is typical of the trust five million inhabitants on the east coast Beaver® CSDs. This would considerably that has developed between the Chinese of the province of Guangdong. It used to enhance the operational window . contractors and IHC Merwede – eight of be one of the treaty ports dedicated to these innovative dredgers have been sold western trade in the 19th century and is And her sister ship so far on the basis of the drawings alone. currently one of China’s Special Economic The GANGHAI JUN 526, the second Two of them will be equipped with the Zones. It is the economic centre of IHC 8527MP®, is working at Cao Fei Dian IHC Systems’ Automatic Cutter Controller. eastern Guangdong and home to a (CFD), a huge land reclamation project for As you read this, two of the dredgers are university and extensive industrial activity the Tangshan city in the northern Hebei already operational. Given the in textile and garments, printing and province. CFD is a promising and expectations, it is time to report on packaging, chemical plastics, toys and favourable location for the development performance. Are the vessels living up to other products for export. of deepwater harbour and harbour- the promise of their specifications? The dredger was deployed for a major related industries. With its imported iron land reclamation project in the area. ore, oil, crude salt, coal and maritime The trail blazer... resources, CFD will give priority to the After an intensive commissioning period At the start of this project, extremely development of iron/steel and equipment for the fine-tuning of the design and the soft and muddy soil had to be dredged. manufacture, chemicals, seawater evaluation of possible areas for The spuds penetrated easily to a depth of desalination, non-ferrous metal smelting, improvement in all subsequent dredgers ten metres and almost disappeared. cereal storage and processing, industrial of this type, the first IHC 8527MP® was The discharge pipeline is limited to four accommodation, modern material delivered to the G&H Tianjin Shunhang kilometres, which is well below the handling, tourism, real estate etc.  Shipping Co. This company was design capability of the pumping established in 2001 and is a member of installation. In this area, the smallest puff The overall objective of the CFD dredging the huge Ganghai Group, currently one of of wind generates high swell, operation is to add a new 60-square the most successful private ship owners considerably restricting the operational kilometre area for the development of in Chinese domestic transport. window. recycling and circular industries, including With 11 bulk carriers, the firm is active in The IHC 8527MP® has proved to be steel and chemical plants, auto parts T 4 he GANHAI JUN 516 was built in a dry dock and her launch proved the success of ‘new building in cooperation’ 5 The GANGHAI JUN 526 connected to her 16-kilometre discharge pipeline – with no booster station – near Cao Fei Dian 6 The ingenious spud-tilting system considerably enhances mobilisation 7 A Chinese crew member contemplates the IHC 8527MP®’s power and her contribution to the future 4 5 32 IHC Merwede | Ports and Dredging | Summer 2010 manufacturing, modern ‘green’ facilitates the mobilisation of the ship Chinese market and effectively contribute agriculture and many other activities. (figure 6). His general impression of the to the country’s future (figure 7). Within At CFD, there are many CSDs of all makes dredger is that everything is exactly two years, six other IHC 8527MP®s will and sizes in operation, and the GANGHAI where it is needed. In the meantime, the join the club! JUN 526 has now taken over as the fleet’s Chinese operators of G&H Shunhang can blockbuster. make the most of the CSDs right out of References the blocks – they have been trained in the  Ports and Dredging 170 pages 32-37. The IHC 8527MP® can now show her 8527 simulator at IHC Merwede’s RIOs in IHC Merwede, Sliedrecht, 2008. mettle, being deployed more or less in Guanghzou and Tianjin.  Ports and Dredging 174 pages 26-31. accordance with the design IHC Merwede, Sliedrecht, 2010. requirements. She is sucking up silty Conclusion  Promoted Industry Guidebook of Caofeidian and claylike sand from a depth of about The performance of both IHC 8527MP® New Area, Tangshan, China. 22 metres, and is connected to a CSDs justifies the conclusion that the 16-kilometre discharge pipeline, which is cooperation between IHC Merwede and actually 33 per cent above the design its Chinese partners results in versatile, value (figure 5). Even at this distance, she high-quality dredgers which fully comply delivers about 950 cubic metres of dry with the specific requirements of the solids per hour. Ports and Dredging spoke to Alex Lanser, IHC Merwede’s Guarantee Principal features IHC 8527MP® Dredge Master, who attended the commissioning works and operated the Length overall, spuds tilted, approx. 116.10m dredger during the early stages of the Length over pontoon Approx. 83m project. He praised the vessel’s Breadth over pontoon Approx. 18m performance, drawing attention to the ease of operation and pointing out how Average draught at 100% deadweight Approx. 3.50m all the components and power Dredging depth 5.00-27.00m distribution work together harmoniously Inside diameter suction pipe 850mm to optimise operations. She performed so well during the sea trials that the Inside diameter discharge pipe 850mm customer – who was anxious to get on Power submerged pump 2,000kW with the actual project – decided to Power onboard pump(s) 2x 3,700kW accept the vessel after limiting the planned eight-hour endurance test to Cutter power at approx. 30 rpm 1,100kW only four hours. Alex Lanser is particularly Total installed power 13,671kW enthusiastic about the ingenious spud Accommodation 25 people tilting system, which considerably 6 7 33 IHC Merwede | Ports and Dredging | Summer 2010 In close collaboration... Over 20 years’ experience with SCADA 34 IHC Merwede | Ports and Dredging | Summer 2010 1 A 1 hardware and software upgrade offers the opportunity to include the automation functionality of new ships like the ARTEVELDE in older vessels D 2 EME’s ANTIGOON was the first TSHD, controlled by a SCADA system onboard control systems. It was desirable to input not only the dredging process into the PLCs, but also the diesel engines and main machinery. The average I/O number on an ANTIGOON-type vessel rose to about 2,300. On top of that, analogue inputs and outputs were included in the flood of signals. DEME took the bold step of using them for measurement and presentation, as well as for control loops. So all the relevant vessel and process data was available in the PLC. That meant there was scope to eliminate a large number of control 2 components and indicator instruments. History In those days, the SCADA system used a In 1988, the Belgian contractor DEME separate card that was inserted into a PC (Dredging, Environmental & Marine slot. The card was an advanced PC itself, Engineering) took a significant step with excellent graphic performance. forward by installing the first supervisory, It was relatively easy to programme for control and data acquisition (SCADA) the presentation of symbols, lines and system on the trailing suction hopper dynamic values on a single dedicated dredger (TSHD) ANTIGOON (figure 2). colour video monitor display (15 inches at Until then, programmable logic the time). All that was left was to controllers (PLCs) had been used establish a data highway connection exclusively to control the extensive between the PLC and the PC, and to hydraulic installations on TSHDs, replacing arrange the PLC signals and status data so the proven relay-and-diode technology. that the SCADA could understand them. The capacity of the systems was in the IHC Systems had already acquired 300+ digital I/O range. Conventional experience with these systems over a components were used for control and number of years in another specialist presentation. They included control field: electrically driven, floating mining levers, knobs and push button/signal wheel dredgers incorporated in a fully lamp combinations, the latter in mimic integrated plant and process automation diagrams mirroring the physical concept. arrangement of the dredge installation, with its range of pumps, sluice valves, Acting in close collaboration once again, bottom doors etc. (figure 3). the buyer and builder developed model screen page formats, including a list of With the introduction of SCADA systems, conventions for displaying several personal computers were integrated into symbols and how they appear and react the vessel’s control circuit. In those days, on the screen. In fact, all new DEME many people thought this approach was vessels in the years that followed – and a adventurous. However, DEME’s technical number of retrofitted older vessels (about department – in close collaboration with 20 TSHDs and CSDs) – stuck to these basic IHC Systems – had carefully examined the conventions, with some updates. merits of special rugged marine-tailored PCs, and concluded that the solution was Developments safe and reliable. Moving further down The visible result on the ANTIGOON was a this road meant greater integration of the drastic reduction in the number of cables, 35 IHC Merwede | Ports and Dredging | Summer 2010 B 3 efore the ANTIGOON, discrete control components arranged in mimics were usual on board TSHDs 4 SCADA allowed the introduction of keyboard/ trackball control 5 A pipe operator’s intuition cannot function without control levers for the suction pipe winches 6 The simplicity and comfort of BRABO’s one-man operated bridge T 7 he operational life of three vessels was 3 5 extended with the latest DEME upgrade: the UILENSPIEGEL... (courtesy DEME) 8 The LANGE WAPPER... 9 and the NILE RIVER 4 6 control and indicator components. General Electric. At about the same time, paved the way for the benefits of one- The former separate processors for the the dedicated Data Highway between PCs man operated bridges (figure 6) on the draught and loading monitor, the suction and PLCs was replaced by faster ethernet- DEME-owned vessels MARIEKE, tube position monitor and production like communications. This intervention REYNAERT, ARTEVELDE, BRABO and measurement (DLM, STPM, PRM) were did not alter functionality as such, but it BREYDEL, as well as on the Royal Boskalis all incorporated in the PLC/SCADA did open up new perspectives for CRESTWAY and SHOREWAY [1, 2], which combination. Valve positions, pump redundancy and switchable SCADA have the same design. Even then, it status, suction pipe positions and draught viewer video screens, and the introduction proved possible to reduce the number of were presented on the video screens, of glass fibre communications. screens by adapting the presentation which still retained some of the old So the move enhanced safety, versatility conventions in response to new insights mimics in those days. Even so, the and electromagnetic compatibility (EMC). about human ability to read and interpret fundamental step forward had been However, in addition to the keyboards data, and by overlaying video pages. taken. Instead of a host of push buttons and trackballs, a relatively large number In short, the developments described and signal lamps, dedicated keyboard/ of discrete control components remained here have made a major contribution to track ball combinations controlled the necessary to safeguard ease of operation. the compactness, safety and ease of relevant installations (figure 4). The operation of DEME’s TSHDs – and the development also encouraged more The third step led to another crews are happy with the innovations, breakthroughs: extended calibration and fundamental change. Large 19” or even too. diagnosis screen pages, considerably 23” touch screens required a new enhancing the availability and approach to the interactive presentation Trilogy in SCADA maintenance of the vessel. This is of colours, symbols and pop-up functions. It is common knowledge that personal because these pages provided a clear So DEME and IHC Systems focussed computers last between three and five remote picture of the status of sensors, intensely on the conventions. They came years, and everybody regularly changes cables, solenoids, electric motors, starting up with a successful solution that made it their PCs – only to discover that old conditions and peripheral devices. The possible to minimise the number of programmes won’t run on newer, faster SCADA systems even made it possible for components leaving only those ones, and more sophisticated machines and a licensed operator with keyword access required by operator intuition – such as new Windows platforms. This means that to the system to override malfunction suction pipe winch control levers the purchase of a new PC always involves apparatus. (figure 5) – and by regulatory bodies. the purchase of additional, up-to-date software packages. So it’s not difficult to The second development was the These three steps – in conjunction with imagine how Jan Lefever, the head of replacement of the hard SCADA card, first new insights at the DEME technical DEME’s B&E department (automation with the IC2000 package and then with department and breakthroughs in suction and electrical installations) felt on the day the Cimplicity soft SCADA platform from pipe handling and pump automation – he discovered that the SCADA systems on 36 IHC Merwede | Ports and Dredging | Summer 2010 8 7 9 the TSHDs UILENSPIEGEL, LANGE marine-type rugged PCs and ethernet considerably by the quality of the solution WAPPER and NILE RIVER had been cables, splitters, KVM switches and similar chosen in the past. In this case, the operating reliably and without equipment on the bridge. stability and durability of the rugged PCs interruption for ten years! Realising how adapted for use at sea outperform the fortunate he had been, he decided not to The process is in full swing and, by the laws of computing at least two or three push his luck and called IHC Systems. time you are reading this article, the times over. There are also other benefits. projects will be reaching the completion The strong relationships with original Working in close collaboration once stage, providing DEME once again with designers – such as IHC Systems – mean again, the two companies decided to the prospect of many years of reliable that vessel functionality can be upgraded replace the SCADA systems for the three control and operations from the young in combination with the modernisation of dredgers with the latest versions, without sand-devouring vessels. other vessels in the fleet, in a single changing the general control philosophy. operation and at relatively low cost This meant that the PLC control system The future (figure 1). This was the road taken by and programming weren’t altered, except Many people in the maritime world fail to DEME’s Jan Lefever. The three vessels’ for a number of updates that IHC Systems realise that using personal computers for control and automation systems are and DEME had developed in the vital functions on seagoing vessels tailored to meet the operational meantime for other ships. In line with involves the laws of Moore (hardware requirements of the present and the everybody’s experience, the older and software capacity doubles about future and Jan can look forward to Windows and SCADA platforms on board every 1½ years), Microsoft and Intel another trouble-free decade. failed to run on the new computers and (why use the technology of today if we support was no longer available. New stock your retailer with tomorrow’s?). References software platforms were the only way The blunt implication of these ‘laws’ is  ‘One man-operated bridge: how dedication out. This implied rearranging the PLC/PC that ship owners are best advised to succeeded in starting a new era in dredging’. data communication format and make plans for replacing this equipment Ports and Dredging 167, pages 14-21. IHC Holland, redrawing the screen pages. At first sight, as routinely as cylinder linings in diesel Sliedrecht, 2007. (on MARIEKE and REYNAERT). this looks like a major time-consuming engines. As it turns out, the desired  ‘Experiences with another PALLIETER-class job. In practice, the IHC Systems modern approach on the bridge and TSHD’. Ports and Dredging 169, pages 30-35. specialists’ skills and the facilities and comfortable control have a price. IHC Merwede, Sliedrecht, 2008. (on BRABO). libraries of the newer systems provide Simply replacing old computers with new extensive support for modifications of hardware is not enough. this kind. In addition, no major hardware changes are required and nearly all the However, the UILENSPIEGEL, LANGE cabling can be maintained. Hardware WAPPER and NILE RIVER (figures 7-9) alterations mainly involve placing new show that the pain can be mitigated 37 IHC Merwede | Ports and Dredging | Summer 2010 On order Yard number / name Specifications Country TRAILING SUCTION HOPPER DREDGER CO 1254 WILLEM VAN ORANJE 12,000m3 The Netherlands 1 CO 1256 ISANDLWANA 4,200m3 South Africa CO 1257 VICTOR HORTA 5,000m3 Belgium CO 1259 12,000m3 China CO 1260 12,000m3 China CO 1263 CONGO RIVER 30,000m3 Belgium 1 CO 1264 DCI DREDGE XIX 5,000m3 India CO 1265 DCI DREDGE XX 5,000m3 India CO 1267 BREUGHEL 11,650m3 Belgium CUTTER SUCTION DREDGER AND WHEEL DREDGER 02490 IHC Beaver® 1200 Congo 02459 IHC Beaver® 50 Latin America 3 02719 IHC Beaver® 6518C Latin America 09.842 GANGHAI JUN 536 IHC 8527MP® China 09.843 GANGHAI JUN 556 IHC 8527MP® China 09.869 IHC 8527MP® China 09.870 IHC 8527MP® China 09.873 HAN LONG IHC 8527MP® China 09.874 XUAN LONG IHC 8527MP® China 09.900 YI LONG IHC 7025MP® China 2 09.901 FENG LONG IHC 7025MP® wheel China 02700 IHC Beaver® 5014C India 02742 IHC Beaver® 600 Paraguay 02457 IHC Beaver® 1200 Paraguay CUTTER SUCTION DREDGER AND WHEEL DREDGER – CUSTOM-BUILT 02730 11,787kW Panama 02732 ZHONG GUO SHUI DIAN J08 13,000kW China 2 02733 ZHONG GUO SHUI DIAN J09 13,000kW China 2 SELF-PROPELLED CUTTER SUCTION DREDGER CO1261 ATHENA 24,000kW The Netherlands CO1268 AMBIORIX 26,100kW Belgium SPLIT HOPPER BARGE 3 09.893 CORNELIS LELY 2,800m Split hopper barge The Netherlands 3 09.894 PIETER CALAND 2,800m3 Split hopper barge The Netherlands 4 38 IHC Merwede | Ports and Dredging | Summer 2010 Recently delivered Yard number / name Specifications Country TRAILING SUCTION HOPPER DREDGER CO 1255 ARTEVELDE 5,600m3 Belgium BN 718 GATEWAY 12,000m3 The Netherlands 4 CUTTER SUCTION DREDGER AND WHEEL DREDGER 02458 IHC Beaver® 50 Nigeria 3 02478 IHC Beaver® 6518 Emirates 02710 IHC Beaver® 1200 Nigeria 02711 JAMJAM-4 IHC Beaver® 1200 Bangladesh 02712 IHC Beaver® 1200 Pakistan 02713 IHC Beaver® 1200 Bangladesh 02756 IHC Beaver® 1200 Bangladesh 09.896 IHC 7025MP® China 09.840 GANGHAI JUN 516 IHC 8527MP® China 09.841 GANGHAI JUN 526 IHC 8527MP® China CUTTER SUCTION DREDGER AND WHEEL DREDGER – CUSTOM-BUILT 02482 AL SAKAB 16,500kW Saudi Arabia BOOSTER STATION 02706 Booster 1686kW Germany WORKBOAT 11046 DMC 850 Bangladesh 11047 DMC 850 Bangladesh SPLIT HOPPER BARGE 09.891 JAN BLANKEN 2,800m3 Split hopper barge The Netherlands 09.892 JAN LEEGHWATER 2,800m3 Split hopper barge The Netherlands 39 IHC Merwede | Ports and Dredging | Summer 2010
"VOX XIMA at work on Maasvlakte Cutter suction dredgers for"