The Seven Arctic will be a highly capable construction vessel for worldwide operations. This new Heavy Construction Flex-lay vessel features a 900t offshore crane and a 325t top-tension Vertical Lay System with 7,000t of underdeck storage.

• Length 162.3m x breadth 32.0m• 900t AHC Offshore Crane• 325t top-tension Vertical Lay System• 7,000t underdeck basket for storage of flexible pipe/umbilicals• Accommodation for 132 persons• Deck Area c. 2,600m²• DP Class 3 with two engine rooms• Deck load of 4,500t at 5m above main deck• Special Purpose Ship code compliant• Transit speed 15 knots• Adapted for both tropical and winter environments • Twin workclass ROVs• Operating depth down to 3,000m

seabed-to-surface

Seven ArcticHeavy Construction/ Flex-lay

Main Crane

The main crane is an active heave- compensated subsea construction crane and has been specifically selected and developed to give outstanding flexibility and capability for a range of different operational requirements. To ensure maximum efficiency, the crane can work in a number of different modes:- 900t triple-fall mode; 600t dual-fall deep sea mode; 600t dual-fall standard mode; 600t dual-fall high lift mode; 300t single-fall mode.

Dual-Fall Deep Sea Mode

For deep sea mode, the rope-luffing knuckle-boom design, together with the rope capture system, allows the two wire rope falls to be widely separated at the surface, while the wide twin sheave block provides separation and anti-twisting movement at depth. This combination of features helps to eliminate the risk of cabling while maintaining a manageable wire size for more standard operations.

Dynamic Positioning

The thruster configuration, in conjunction with the main propulsion shafts and CP propellers, affords the vessel a position-keeping capability able to withstand harsh operating conditions. The vessel has DP Class III and DP Class II notation, allowing different environmental limits depending on the requirements of the operation being undertaken.

seabed-to-surfaceSeven Arctic Heavy Construction/Flex-lay vessel

325t Vertical Lay System and 7,000t Underdeck Basket Carousel

The vessel is fitted with a Vertical Lay System, suitable for laying flexible flowlines and risers, umbilicals and power cables. The four-track tensioner is retractable to facilitate passing large pipe-end fittings and other structures. Product can be loaded into the underdeck basket through one of two loading hatches. The aft deck of the vessel is suitably strengthened to accommodate an optional 3,000t capacity deck carousel or a multi-reel drive system.

Aligner MBR = 6m

Retractable Tensioner 325t

Track length = 8.4m

A&R = 360t

Moonpool 7.2 x 7.7m

Carousel and VLS; Longitudinal view

Wind (knots)

Basket: Radius = 26.2m Capacity = 7,000t Volume = 3,100m³

Surface current = 2.0 knots

Wind Speed (knots)

Sig. Wave Height (m)

10 1.8

20 3.3

30 5.2

40 7.5

50 10.1

General InformationType Heavy Construction/Flex-layClassification Lloyds Register, X100A1, Offshore

Supply Ship, LA, Helicopter Landing Area, WDL(+), ShipRight (ACS(B)), *IWS, ECO(IHM, OW, P), ICE Class 1D FS, Winterisation H(-30) C(-30), XLMC, CAC 3, UMS, DP(AAA), Descriptive note ShipRight (BWMP(method)), SPS

Built Hyundai Heavy Industries, 2016 Flag Isle of ManYear Built Delivery due 2016

Principal DimensionsLength Overall (m) 162.3mBreadth (m) 32.0mDepth Main Deck (m) 13.5mOperating Draught (m) 8.5mTransit Speed (knots) 15 knots

www.subsea7.com© Subsea 7, 2014. Information correct at time of going to press.

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Seven Arctic

Dynamic Positioning SystemsDP Classification DP Class III DP HIL CertificationReference System 2x taut wires, 3x Veripos DGNSS,

2x HiPAP 500, 1x CY Scan

Power and PropulsionEngine Rooms 2Main Engines 6 x HiMSEN 9H32Power (kW) 4,275kW

Generators 6 x TBCPower 4,125kW

Propulsion 2 x Controllable pitch propeller shafts

Power 9,200kW

Thrusters 4 x Tunnel Thruster (2 Fwd, 2 Aft)Power 2,600kW

Azimuths 2 x Retractable Azimuth Thruster (Fwd)

Power 2,300kW

Main DeckClear Deck Area 2,600m²Deck Strength 15t/m² aft of main crane

10t/m² elsewhere

Tank Capacities (100%) Fuel Oil (m³) 3,700m³Fresh Water (m³) 1,300m³Ballast Water (m³) 7,400m³Anti-Heel Tanks 3,000m³Anti-Roll Tanks 1,800m³

Accommodation Berths (No.) 132Cabins (No.) 50x single cabins 41x double cabins

HelideckType NORSOK Compliant Suitable for

Sikorsky S-92 / AugustaWestland AW101, c/w Helicopter Monitoring System

Cranes Main Crane Capacity (t) 900t @ 20m

600t @ 30m 300t @ 53m

Manufacturer HuismanOperating Water Depth (m) 3,000mMain Lift Wire 6,350m / 109mm AHC YesLocation Main deck, port sideAuxiliary Hoist 40t at 58m, certified for man-

ridingAuxiliary Cranes (t) 1x 100t AHC at 15m

1x 25t AHC at 15mOperating Water Depth 3,000mLocation Main deck, starboard side

Moonpool Number 1Dimensions: 7.7m x 7.2m

Vertical Lay SystemTensioners 1Dynamic Top Tension 325tA&R Capacity 360tA&R Wire Length 3,000mHang Off Clamp 360t

ROV SystemROVs 2x WROVOperating Depth (m) 3,000mInstalled in ROV hangar, port and starboard side at aft end of superstructure, deployed over the side on rail-guided cursors. ROV control room, workshops and stores fully integrated into the vessel.

EnvironmentalHull form and propulsion arrangement optimised to reduce fuel consumptionWaste heat recovery system fittedSCR equipment installed in exhaust to reduce NOx emissionsBallast water treatment system installed to protect biodiversity

Underdeck BasketCapacity 7,000tVolume c.3,100m³Outer Wall Diameter (inner) 26.2m

Ice and Winterisation Features include hull plate strengtheningTrace heating of helideck, lifeboat, and other critical areasTank heating of fresh water tanks, and other measures