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Polar Onyx (Orient Adventurer)
Originally designed and built as a subsea vessel, she was later (2025) converted to a cable-laying vessel for maintenance, installation, and other subsea activities in offshore wind operations.
Vessel Type
Related Solutions
Aftermarket Service
Ordered By
GC Rieber Shipping
Owned By
Dong Fang Offshore
Built By
Ulstein Verft AS
Year
2014
Yard Number
300
IMO Number
Primary specifications as built
Length
130 m
Beam
25 m
Dead weight
8,207 tonnes
Draught
7 m
Speed
15.1 kn
Accommodation
130 people
Deck area
1,700 sqm
Additional Data
Operating depth
-3,000
m
Fuel oil (MDO)
2,078
cbm
Fresh water
1,086
cbm
Ballast water/Drill water
6,300
cbm
MEG
318
cbm
Sewage
156
cbm
Urea
130
cbm
Highest standard of dynamic positioning
DP3 / Operation+
VLS system for installation of flexible pipe and umbilicals (50 - 630mm OD)
275
t
Note: Specifications may have changed since the original completion date.
Classifications: DnV1A1, SF, E0, DYNPOS-AUTRO, CleanDesign, NAUT-OSV(A), COMF-V(3), COMF-C(3), HELDK-SH, CRANE, SPS, VIBR, BIS, DK(+)
Aftermarket history
IMO number: 9664706
Design service
2024-08 - 2025-04 Accommodation containers, Engineering
2025-01 - 10 Basic and Detail Engineering + stability calculation
The upgrade includes relocating the existing Huisman VLS tower to new positions on the main, A, and B decks, installing a foundation for a W2W gangway system, and integrating a 3,000-tonne Huisman cable carousel.

Get in touch

Roy Lindset
- Description
- Sales Manager Service & Aftermarket
- Affiliation
- Ulstein Design & Solutions AS
