General – Newbuilding
N-Sea’s trusted partner Neptune Marine is currently building a new, next-generation, multi-purpose shallow draft vessel for N-Sea’s cable installation and activities.
The vessel is under construction in Poland and will transfer to the Netherlands in Q4 2025 for fitting and commissioning in Q2 2026.
The newly built DP2 vessel Altera will be dual-fuel (methanol) prepared, equipped with a 25t offshore knuckle boom crane, a mooring system, and can accommodate up to 99 people.
The deck spread has been designed and procured by N-Sea, considering valuable lessons learned by the N-Sea team over the last 15 years, in cable repair and installation on Offshore Wind and Interconnector projects.
The 4,500t carousel, 15t tensioner, quadrant handling system, and shunts are designed to handle cables with minimum bending radii of up to 5 mtr. Installation of the deck spreader will commence in Q1 2026 by the N-Sea mobilisation team in the Netherlands, managed from the new offshore supply base and logistics centre in IJmuiden.
The combination of its mooring system, DP2 capabilities, and beaching capabilities will enable the vessel to operate year-round in both very shallow and deep water conditions on interconnector, export, and inter-array cable projects.
