Our Fleet

HMC owns the world’s largest crane vessels: semi-submersible crane vessel (SSCV) Thialf and Deepwater Construction vessels (DCV) Balder and Aegir (monohull). The Deepwater Construction Vessels can next to their lifting capabilities also execute complex deepwater infrastructure and pipeline projects in ultra deep water. HMC is also currently developing a new vessel: the new-generation semi-submersible crane vessel Sleipnir, which will be operational in 2019.

Our fleet has large deck areas and unique capacities in the areas of heavy lifting and motion behavior. This has earned us a reputation for superior workability and excellent station-keeping.

Harsh environments and great water depths demand an innovative approach, experience, and, of course, the right equipment. Our versatile fleet and sound project management ensure a smooth marine operation.


Aegir, our latest deep-water construction vessel (DCV), is capable of executing complex infrastructure and pipeline projects in ultra-deep water and has sufficient lifting capacity to install fixed platforms in relatively shallow water.


DCV Balder was converted in 2002 into a full class III DP deepwater construction vessel (DCV). This DCV concept combines the best of the well-known SSCV concept with a series of multi-functional deepwater tools. The Balder has two cranes – one with a capacity of 2,700 tonnes and the other 3,600 tonnes – and operates a J-lay system on its DCV. The vessel has an overall length of 154 meters (505 ft) and a width of 86 meters (282 ft).

Support equipment

HMC operates a large variety of marine equipment, e.g. tugs, barges, and hammers.


SSCV Thialf is currently the world’s largest crane vessel. Its two cranes provide for a depth reach lowering capability as well as a heavy lift capacity of up to 14,200 tonnes. The vessel has an overall length of 201.6 meters (661 ft) and a width of 88.4 meters (290 ft).


The new-generation semi-submersible crane vessel Sleipnir is designed for worldwide offshore heavy lifting. It will be equipped with two cranes of 10,000 metric tonnes lifting capacity each and a reinforced deck area of 220 meters in length and 102 meters in width, which will make it the largest crane vessel in the world.


Heerema Marine Contractors (HMC) has recently been the victim of a number of fraud attempts where law firms, purchase departments and potential recruits are fraudulently approached by individuals alleging to represent HMC. These attempts often originate from (but not limited to) Outlook, Hotmail, Gmail or .net addresses. For the avoidance of doubt: HMC’s domain name is hmc-heerema.com and HMC does not use the aforementioned e-mail addresses for any of its correspondence.

In case you have received any suspicious e-mails from the addresses above or any new addresses that you deem unusual or odd, please contact us immediately at communications@hmc-heerema.com, or call +31[0]71 579 9000 and ask to speak to the Communications Department.