For offshore cable installation, ROV-Work, Plough Work, Rig Moves and Anchor Handling. JD-Contractor is operating the Subsea Construction Vessel ‘Assister’. The vessel is based on the Multipurpose AHTS A-type. Engineered, designed and built by Mærsk Supply Service. Assister can be mobilized with various equipment/setups for work at sea and for Subsea Construction.

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Information Principal dimensions​
Type of Vessel Multipurpose AHTS A-type Offshore Installation Subsea Construction Vessel, Length over all 90.3 m
Dynamic Positioning DP 2 Breadth moulded 23.0 m
Owner JD Crafts A/S Depth Moulded 9.5 m
Operator JD-Contractor A/S Summer draught 7.8 m (10.8 m with the Azimuth down)
  Air draught 26,35 m
Deck equipment Gross Tonnage 6.536 tonnes
Towing Arrangement Towing Winch MBP 2 X 400 T
The Maximum Bollard Pull (MBP) 252.7 T
Accommodation 59
Crane capacities Crane Stb (onshore)    11t/14m
Crane Stb (offshore)    5.5t/14m
Crane Ps (onshore)    11t/14m
Crane Ps (offshore)    5.5t/14m
Crane Aft (offshore)    2.1t/14.5m
Crane Aft (offshore)    0.8t/14.5m
A-Frame out    250 t
A-Frame in    200 t
Main Engines 23.500 BHP
A-Frame SWL 36 t Winch with MRU heave compensation Auxiliary power 2.250 kW
Free deck area 803 m2 Speed Max 16 kn, ECO 10 kn
When required the vessel can be equipped for:  
Cable installations
Operation of subsea plough systems
Platform for subsea and ROV work
Deep water Anchor Handling & Mooring operations
Rig moves (towing)
General supply duties