Siem N-Sea – DPII OSV

The Siem N-Sea is a NAUT OSV DPII dive, multi-support and construction vessel, designed to meet the needs of the offshore subsea industry. It is laid out and equipped to perform a range of subsea services for marine based rigs, platforms, FPSO’s and renewable energy solutions with minimal impact on production.

Principal dimensions:

  • length overall        93.60
  • beam                     19.70m
  • draught summer    7.85m
  • gross tonnage       4850mT

Principal characteristics:

  • complement 68 passengers, offices, hospital, recreation and mess room
  • deck layout 1046m2 @ 10mT/m2, moon pool, 21m helideck (S92 Sikorsky)
  • cranes 100mT offshore crane hyco, 2x 5mT deck, one man riding
  • DPII Kongsberg K-Pos Dp-22
  • performance  15.5kts
  • equipment - various ROV and Diving systems including LARS’s


  • +1A1 ICE-C Supply Vessel OILREC SF
  • NAUT-OSV(A) CLEAN DK(+) HL(2.8)A, BS +A1, CIRCLE E, +AMS, +DPS2.
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