01 // HULL & BOW ARCHITECTURE

OPERATIONAL // CLASS II

Assister — Subsea Construction

Purpose-built 90.3m DP2 subsea support and offshore construction vessel engineered for demanding North Sea and global operations.

90.3 m

Length Overall (LOA)

18.8 m

Moulded Hull Beam

Hull Form & DraftBulbous Bow / 6.2 m Max Draft

02 // DP2 COMMAND & BRIDGE

OPERATIONAL // CLASS II

Dynamic Positioning & Command

Full 360° panoramic bridge visibility with redundant Kongsberg DP2 station-keeping control and multi-tier offshore accommodation.

DP2

IMO Class II Redundancy

8,400 kW

Total Thruster Power

Offshore Complement68 Persons (SPS Compliant)

03 // SUBSEA CRANE & DECK

OPERATIONAL // CLASS II

Subsea Crane & Working Deck

Expansive reinforced timber and steel working deck equipped with an active heave-compensated knuckle-boom crane and dual ROV support.

100 t

AHC Subsea Crane @ 12m

820 m²

Clear Deck (10.0 t/m²)

Subsea Wire Rating2,000 m Active Heave Comp.

04 // STERN GANTRY SYSTEM

OPERATIONAL // CLASS II

Heavy Stern A-Frame & Winch System

High-capacity hydraulic stern gantry A-frame engineered for heavy subsea lift, umbilical deployment, and seabed ploughing.

150 t

SWL Hydraulic A-Frame

150 t

Continuous Line Pull

Isometric Footprint90.3 m × 18.8 m

01 // HULL & BOW

Assister — Subsea Vessel

90.3 m LOA

Length Overall (LOA)

18.8 m Beam

Moulded Hull Beam

90.3m Ice-1C DP2 subsea support & construction vessel (4,850 GT).

05 // ARCHITECTURAL SPECIFICATION & CAPABILITY MATRIX

Assister — Subsea Construction Architecture

HULL ENVELOPE

90.3m

Length Overall (LOA)

18.8 m Moulded Beam

HEAVY SUBSEA LIFT

150t

Stern A-Frame SWL

150 t Subsea Plough Winch

ACTIVE HEAVE COMP

100t

Main Subsea Crane

AHC @ 12m / 2,000m Depth

DYNAMIC POSITIONING

DP2IMO II

Redundant Station Keeping

8,400 kW Total Thruster Power

01 // PRINCIPAL DIMENSIONSGA-903

Principal Dimensions & Deck

Hydrostatic hull proportions and main deck structural envelope.

PROPORTIONAL HULL SCALE1 : 100

Depth to Main Deck7.8 m

Max Operational Draft6.2 m

Gross Tonnage4,850 GT

WORKING DECK STRUCTURAL RATING

820 m²

Clear Working Deck Area

10.0 t/m²

Deck Strength Rating

02 // DECK MACHINERY & LIFTINGAHC / SWL

Deck Machinery & Subsea Lifting

Active heave-compensated crane, stern ploughing gantry, and heavy winch spreads.

Main Subsea Crane100 t AHC @ 12m

CAPACITY INDEX2,000 m Subsea Wire

Stern Gantry A-Frame150 t SWL Hydraulic

CAPACITY INDEXFull 90.3m Envelope

Trenching / Plough Winch150 t Line Pull

CAPACITY INDEXSubsea Umbilical / Tow

Stern Roller4.5 m × Ø2.2 m (180 t)

CAPACITY INDEX180 t SWL Rating

SUBSEA ROV & DECK INFRASTRUCTURE

Dual Hangar LARS (3,000m Work-Class ROV Spread)Heavy Timber & Steel Deck

03 // PROPULSION & DP28,400 kW TOTAL

Propulsion & DP2 Station Keeping

Diesel-electric thruster distribution and IMO Class II redundant dynamic positioning.

TOTAL INSTALLED THRUSTER POWER8,400 kW

Main Stern Propulsion

2 × 2,500 kW Azimuth

5,000 kW (59.5%)

Bow Tunnel Thrusters

2 × 1,200 kW

2,400 kW (28.6%)

Bow Retractable Azimuth

1 × 1,000 kW

1,000 kW (11.9%)

POSITION REFERENCE SENSORS & BRIDGE COMMAND

3× DGPSHiPAP 502CyScan360° Fwd & Aft Bridge Consoles68 Persons (SPS Code)

TECHNICAL BLUEPRINT FOLDERREV 4.2

General Arrangement & Spec Dossier

Complete architectural general arrangement drawings, crane lifting curves, deck load plans, and IMO DP2 capability plots.

PROFILE WIREFRAME // M/V ASSISTER90.3m × 18.8m

GA-ASSISTER-REV4.PDF // 14.2 MBDWG SCALE 1:100

OFFSHORE CHARTERING DESKDirect Vessel Operations

Charter & Subsea Project Inquiry

Select one or more operational disciplines below to request charter availability and project engineering support.