DCV Aegir is a Deep Water Construction Vessel owned by Heerema Marine Contractors and was christened during a festive ceremony in September 2013. A 2,500 kW tunnel thruster in the bow is used for harbour manoeuvring and in dynamic positioning mode.

The DG sets themselves are located in two engine rooms, separated by a watertight bulkhead on the centreline. These strict rules include, amongst others, following passenger ship requirements resulting in tighter stability requirements especially during lifting operations and a special ‘Evacuation Analysis’.

The Aegir is a multipurpose deepwater construction vessel, designed to meet a wide range of demands of complex deepwater projects under a single contract. Aegir has accommodation for between 289 and 305 crew, subject to whether the client requires NMA compliance, which maximises the occupancy at two per cabin. This brings with it another set of challenges that the industry has to overcome and vessels need to be designed to anticipate and accommodate these developments.

Here it goes through the aligner reel and then through a straightener and two tensioners. The Aegir is a fast moving DP crane vessel with increased deck space in addition to Heerema's Semi Submersible Crane Vessels. This is not a matter of luck or good fortune, but rather the result of a careful investigation into the industry’s requirements and a tailored solution design to meet them.

Initial studies of working procedures indicated that a single multipurpose vessel which, when supported by other vessels, could stay ‘on station’ would be more cost-effective than a vessel returning to port to load more materials over the increasing distance entailed by working fields further offshore.

DCV Aegir is equipped with two ‘work class’ Remotely Operated Vehicles (ROVs) complete with their own launch and recovery systems (LARS). In this process, a reel is aligned with the laytower, the pipe comes off the reel in the direction of the stern of the vessel and arches up to the top of the tower. The vessel also has a 1,600 kW emergency DG set installed above main deck. The design allows for easy and fast mode changes from reel-laying to J-laying or deepwater construction and vice versa, ensuring that the maximum amount of jobs can be taken on and the ship’s planning calendar shows minimal blank areas. The deck layout was driven by the offshore mast crane, which had to be placed at the stern to allow for offshore construction work over the stern. For dynamic positioning, an additional four 3,200 kW retractable azimuthing thrusters are provided. In fact, the development and manufacture of the pipe laying and handling equipment, cranes and lifting gear took more time and money than the vessel itself.
This simulator has been delivered in three versions: This simulator comes equipped with a multitude of training scenarios, ranging from load tests to real life procedures, like buoyancy tank removal and the installation of the RJ Tower on the AEGIR itself. The cranes, deck tracks and pipe lay tower foundations were installed on the vessel at the shipbuilders in Korea, the vessel was then sailed to Schiedam where the rest of the pipe laying and handling equipment was fitted before sailing to the Caland Canal in the Port of Rotterdam for completion and preparation for trials. The initial design of the vessel was handled by Ulstein, while the overall design phase consisted of four parallel evolutions: the shipbuilding (DSME), the offshore mast crane (Huisman, China), the multi-joint pipe handling plant (Remacut, Italy) and the Multi Lay System (Huisman, the Netherlands). These centrifugal pumps are frequency-controlled, allowing them to maintain a specific differential of head between the tanks, without closing the cross-over valves. Aegir, owned by Heerema, is capable of pipe laying, subsea installation work and heavy lift construction work.

Abandon and Recovery/Deepwater lowering system. Hence, they were pleased with the prospect of being able to develop the Ulstein SOC5000 concept to a new level. One of these tasks is the ability to follow a pipe for survey purposes. A copy of the full mission simulator onboard the AEGIR. Summarised in a few words: ‘A versatile Swiss pocketknife, among the Heerema Sea Giants’. The monohull of the vessel has been specially designed to provide a high transit speed. The simulator also is an excellent platform for preparing specific lift operations. The fact that Aegir s first contract in the Gulf of Mexico and the following contract in Western Australia were awarded long before the vessel had been fully designed and built is a testament to the fact that the Aegir is the solution to such challenges. The same functionality is available to set-up a custom lift procedure. This process is known as Abandon and Recovery (A&R). The usage and benefits of the hang off module will be … The loading system for the reels ensures that the vessel will be doing mostly what it is built for (pipe laying) and will spend a minimal amount of time on what can be done by almost any vessel: spooling and shipping reels. Dictated by the water depth, during reel-laying, the tower is also tilted back to reduce the pipe angle at the top of the tower. Concept studies and the basic ship design. The vessel in question is the Deepwater Construction Vessel (DCV) Aegir, a collaboration between Dutch companies Heerema Marine Contractors, Ulstein Sea of Solutions (design), Huisman (lifting gear and pipe lay tower), Remacut of Italy (pipe multi-jointing equipment) and Daewoo Shipbuilding & Marine Engineering (DSME, vessel construction) in South Korea. When the instructor would like to provide a new challenge, with the exercise creator the existing scenarios can be modified to create new scenarios, like recovery from a faulty situation, expanding the educational reach of the simulator.


In this full mission simulator the Huisman control system is integrated and the hydrodynamic responses are calculated by Octopus (ABB-Amarcon). Parallel with Aegir, Heerema has commissioned two reel-transportation barges, two tugs and three reels.

In close cooperation with Huisman Equipment Tree C supplied a 4.000mT OMC heavy lift and multi pipelay simulator of the DCV AEGIR to Heerema Marine Contractors. The reels themselves have a 16 metre drum and 2,000 tons pipe load capacity making Aegir one of the largest reeling ships in the industry.

Two A&R winches are installed below the main deck, one of which is heave-compensated. Once in place and aligned the Quad & PLET Loader is tilted up to align with the tower. The simulator was already used during the build phase, amongst others, to validate the critical lifts in preparation of commissioning the crane. An added benefit, next to the possibility to avoid expensive drydocking in some cases, is that during regular drydockings, the ship does not need to be docked on four-metre high keel blocks, as a defect thruster can be taken out before the docking. In other cases, eight of the cabins can be occupied by four people, which increases the total capacity by 16 people. The solution was a vessel capable of embarking heavy loads in the form of straight pipes, pipe reels and other equipment whilst at sea allowing the other vessels to ferry materials out to it.

Sometimes a pipe has to be picked up which has been laid by another ship, or the pipe has to be lowered to the bottom when the job is completed. It is always good when a ship’s owner secures a contract for the use of the vessel before it comes into service. Conveniently, the mast is located on starboard, so the lightest loads (the empty reels) are lifted with a longer outreach and the heaviest loads (the full reels), with a short outreach.

The company was well aware that the future of deepwater production promises much growth and technical development. Power is generated by six 8,000 kW Hyundai diesel generator (DG) sets, grouped in pairs and connected through three main switchboards in three separate watertight compartments. ROVs are used for a wide range of tasks, such as pre-lay surveys or touch-down monitoring. Aegir DCV has an overall length of 210m, width of 46.2m, moulded depth of 16.1m and operational draft of nine to 11m. To accommodate this, the tower can be tilted backwards up to 65o to decrease the sag bend radius. Alternative procedures can be assessed and the best candidate saved to document bids and to be used to familiarize the operational team with the actual execution. The vessel itself is a DP3 monohull built under the Special Purpose Ships (SPS) code, whilst at the same time complying with the requirements of the Norwegian Maritime Authorities (NMA). At 211.50 metres overall length, the design of Aegir is based on the Ulstein SOC5000 design, albeit much modified and customised. The ROVs are capable of working to a depth of 3,500 metres, within a radius of 1,000 metre. The pipes can be either single-walled or double-walled. The transit draft of the vessel is eight metres and the length between perpendicula… For this, a large main crane was required which would have a significant impact on the stability of the vessel, especially when transfers are conducted at sea. The crane is designed for two times 2,000 mt split lifting, this offers the ability to upend piles and structures. 200,000 t. Under these conditions, we are perfectly prepared to […], TPC Changhua Phase 1 foundations all in place, Solstad Offshore receives early charter termination for ‘Normand Maximus’, MDL custom solution for North Sea tie-back campaign, Aegir suffers dropfall incident offshore Taiwan, Ulstein converts Heerema’s ‘Aegir’ to offshore heavy lift vessel, Aegir preparing for Taiwanese offshore wind job. When the vessel is J-laying, the pipe reels and transportation system are stored off the ship to create space for the storage of new pipe lengths. For an eight-inch pipe, this corresponds to about 21.5 kilometres. A situation that confronts all pipe and cable layers sooner or later is the need to leave the pipe or cable before a severe storm and then return when the weather moderates. The first challenge in the solution described above is that of loading the Aegir from the support barges. The DCV concept offers a full range of facilities, capable of executing complex infrastructural and pipeline projects in ultra-deep water and sufficient lifting capacity to install fixed platforms in relatively shallow water and structures in deep water. The tower stands over a moonpool in which the previously installed pipe is retained on a hang-off clamp. It is a fact that the continuing demand for oil and gas is pushing the industry to tap into resources further offshore and in ever deeper water. The safety equipment includes six totally enclosed Norsafe lifeboats type JYN100 with a single pivot davit with onload release hook system and two fast rescue boats with luffing davits. The combination of the high fidelity physics modelling in combination with the applied hydrodynamics provide highly consistent responses of the simulated vessel, a prerequisite of the client. Usually this happens towards the later stages of the build of the vessel.

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