Ulstein Verft has delivered the offshore construction vessel 'Polar Onyx' to GC Rieber Shipping. The vessel's first assignment will be to work for deep water projects serving as pipelay support vessel for Petrobras in offshore Brazil.
The 130-metre long x 25-metre 'Polar Onyx' is based on Ulstein's SX121 design and features a high capacity for flexible pipe cargo both below deck and on the main deck.
The 'Polar Onyx' can accommodate 130 persons and complies with modern international environmental standards. She is certified according to special purpose ships (SPS) and clean design notation and carries a green passport.
On deck, the vessel has a large construction/cargo deck area of 1,700m2. She is equipped with an AHC offshore crane capable of lifting 250 tonnes at a 14-metre outreach, as well as a 12-tonne AHC offshore crane. She will also carry two ROVs, one to be deployed through a moon pool and the other over the starboard side.
The vessel is classed according to DNV and meets the highest standards for station keeping, redundancy and dynamic positioning (DP-3), with additional redundancy on all major components on board.
Moreover, operability in DP-2 operational mode is maximised due to the 'Operation+' feature, allowing the vessel to continue and retain system integrity with uninterrupted operations even after a substantial single system failure.
The 'Polar Onyx' is powered by a diesel electric plant comprising of six identical 2,740kW generator sets. Due to three thrusters forward and three azimuthing main thrusters aft, the vessel is kept on a steady course during pipe laying operations.