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Offshore Support Journal

Offshore Support Journal

Custom-designed dive support units delivered to Stapem Offshore

Tue 13 Mar 2018

Custom-designed dive support units delivered to Stapem Offshore
Stapem Beluga will be followed into service by a sister unit, Stapem Narval, which is currently under construction

Incat Crowther in Australia is well known for the crewboats it designs but has also provided owners with several dive support units, of which Stapem Beluga is the latest


Stapem Beluga, the first of two Incat Crowther-designed 18 m aluminium dive support catamarans, has arrived in Angola early in 2018.

Built under ABS survey by Legacy Marine Group in Port Elizabeth, South Africa, for French oil and gas services company Stapem Offshore, the Marshall Islands-flagged vessel will operate off the Angolan coast where it will begin work.

The vessel design was fully customised to suit the client’s specific operational requirements and is equipped with a bow configuration specific to the landings on floating production, storage and offloading units and platforms for safe transfer of personnel. The vessel also has custom-fitted fendering suited to the operational conditions.

Equipment fitted to the vessel includes a three-person Unique Hydra nitrox air dive system, complete with multiple video and two-way communication as well as data-logging systems, onboard high-pressure and low-pressure air compressors, underwater welding facilities, Caviblaster underwater high-pressure washer, full diesel engine-driven hydraulics system for subsea tools and deck crane, twin aircon units and FP duty and standby diesel generators.

The vessel is also fitted with lighting to support night operations, including a forward-looking infrared camera system.

The aft deck is configured to support dive operations and has full CCTV camera coverage. Four dive ladders and three davits are also fitted to the aft deck. 

The vessel is classed to ABS +A1 (E) HSC Coastal Craft +AMS and has a full array of safety and detection systems suitable for use in the offshore oil and gas industry.

The vessel design is a semi-planing catamaran hull, propelled by two 560 hp MAN inboard diesel engines coupled via ZF360 gearboxes to Hamilton HJ403 waterjets with full MECS control, giving it excellent manoeuvrability, an operational speed of 20 knots and a sprint speed of 23.5 knots.

The fuel systems provided allow for high-end water separation and filtration of diesel from main tanks to day tanks to accommodate substandard fuel qualities.

The vessel is designed to work alongside a mothership and is not required to provide crew accommodations. Its primary mission objective is to serve as an effective dive workstation from which dive operations can be carried out on a 24/7 basis by a team of 14 personnel in a safe and comfortable manner.

Stapem Beluga’s sistership Stapem Narval is currently under construction at Legacy Marine’s yard in Port Elizabeth.

Keppel Singmarine delivers multipurpose ice-class vessel

Keppel Singmarine Pte Ltd, a wholly owned subsidiary of Keppel Offshore & Marine Ltd (Keppel O&M), has delivered a multipurpose ice-class vessel to New Orient Marine Pte Ltd, a subsidiary of Luxembourg-based Maritime Construction Services SA .

Everest was built to a proprietary design from Keppel O&M’s ship design and development arm, Marine Technology Development (MTD), and can operate in ambient temperature as low as -30°C. It has ice-class Arc 5 notation and class 3 dynamic positioning. It is capable of navigating in ice up to 1 metre thick.

Everest can carry out subsea repair and construction activity at depths of up to 3,000 m and is also capable of well intervention and dive support services with an 18-peson twin-bell system. The vessel is also capable of fire-fighting, towing and the provision of supplies.

In the last decade, Keppel O&M has completed 10 ice-class specialised shipbuilding projects, excluding Everest.

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