CSS DESIGNS

CSS ImageThe Compact Semi-Submersible (CSS) integrates the motion benefits of a semi-submersible into a compact platform to ensure low day charter rates and an industry leading design in terms of operability, time on station, and operational flexibility.

With the objective of creating a platform with superior deadweight, deck cargo area and capacities to comparable designs, DP-3 capability, and flexible mission fit, the Vard Marine engineering team has produced a series of units from 65m to 100m in length with a single full length strut per side that is more capable and much more cost-effective than its nearest competitors.   The CSS provides a configurable platform that can be adapted, and easily re-adapted, to changing customer needs in a compact package that outperforms more expensive purpose-built ships in operability and time on station.

Extensive seakeeping model tests have been conducted to assess structural loads, unit operability, seakeeping characteristics, and slamming loads for a range of unit sizes. The resulting platform offers the ability to undertake a wide variety of construction, well intervention, dive support, mothership and offshore accommodation roles.

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    84m Accommodation Support Vessel

    The CSS Olympia’s primary function is to act as a floating accommodation unit for rig personnel. Olympia connects to the rigs, FPSO’s and offshore platforms via a telescopic gangway system and is capable of accommodating up to 431 people. Other features include a 12.8 tonne rated helideck, DP-3 rating and a 150MT telescopic boom crane.

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    84m Light Well-Intervention Vessel

    The CSS Derwent’s primary functions are well intervention, well stimulation and subsea installations. The primary features of the vessel are a 200MT module handling system, 150MT knuckle boom crane, two ROV launch and recovery systems, a moonpool, a helipad that accommodates heavy helicopters, DP-3 rating and accommodation for 152 people.

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    84m Fit For Purpose

    The CSS Belait-1 is a multi-functional well-intervention, supply and light construction vessel. The primary features of the vessel are a 150MT lattice boom crane, a telescopic heave compensated gangway, a moonpool, a 12.8 T rated helideck, DP-2 rating and accommodation for 199 people.  The  vessel  is  equipped  to  operate  as  a  thruster  assisted  4pt moored vessel significantly reducing refuelling requirements. It can also operate in DP-2 mode without the use of the 4pt mooring system.

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    65m Windfarm Support Vessel

    The CSS W65 is a smaller version of the successful 84 m CSS design.  This smaller unit is primarily designed to provide accommodation and recreational facilities as an offshore base for wind turbine maintenance crews. The flexible platform has 750m² of working deck, 150T deck cargo carrying capacity and an active heave compensated walk to work crew transfer gangway.  Some additional key features of the design are a CAP 437 compliant helideck with a 12.8 T rating, 50T knuckle boom crane and the capacity to accommodate 56 persons all in single berth MLC compliant cabins or up to 130 in double cabins.  Due to the hull design and hybrid battery assisted propulsion package configured in a DP-2 arrangement, the CSS W65 is able to remain connected to a turbine through a large range of environmental conditions without having to disconnect due to excessive motions.

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    98m Maintenance and Accommodation Support Vessel

    The CSS M98 is a larger version of the successful 84 m CSS design.  This larger unit is designed to provide enhanced accommodation and recreational facilities, an increased deck cargo capacity and increased crane operational capacity.  Some key features of the design are the 30.5m to 46.5 m telescopic gangway, a helideck with a 12.8 T rating, 100T knuckle boom crane and the capacity to accommodate up to 501 persons with crew in single berth cabins.  Due to the hull design and DP-3 arrangement, the M98 is able to remain connected to a platform through a large range of environmental conditions without having to disconnect due to excessive motions.

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    100m Accommodation Support Vessel

    The CSS M100 is the largest version of the successful 84m CSS design.  This unit was designed to meet market demands for a larger and more capable platform based on the same motions and cost effective design principals of the original design philosophy.  The flexible platform has 2000m² of working deck, 1000T deck cargo carrying capacity and a walk to work crew transfer gangway.  Some additional key features of the design are a CAP 437 compliant helideck with a 12.8 T rating, 100T and 20T offshore knuckle boom cranes and the capacity to accommodate 501 persons in a combination of single and double cabins.  Due to the hull design the propulsion package configured in a DP-3 arrangement, the CSS 100M is able to remain connected to an offshore platform through a large range of environmental conditions without having to disconnect due to excessive motions.

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