Odfjell has applied for an Acknowledgement of Compliance (AoC) for Deepsea Yantai.

In connection with an AoC application, the PSA conducts audits within selected specialist domains. On 1 and 2 October 2019, we carried out an audit of structural safety and maritime systems for Deepsea Yantai. The emphasis of this second audit was on maritime systems, the integrity of waterproofing and weatherproofing, ballast systems, anchoring systems and dynamic positioning.

Deepsea Yantai was originally ordered by North Sea Rigs, and was registered at the time under the name Beacon Atlantic. The facility was built in China by CIMC Raffles between 2012 and 2016, since when it has been laid up at the shipyard. Odfjell has been contracted by Neptune Energy Norge to use the facility on the Norwegian Continental Shelf, for which purpose it has applied for an Acknowledgement of Compliance (AoC).


The objective of the audit was to verify through spot checks whether the technical condition and relevant documents were in compliance with the requirements in the petroleum regulations.


Nonconformities were identified relating to:

  • The remote closing system for watertight sliding doors
  • Audible alarm for watertight sliding doors
  • Damage stability
  • External air ducts
  • Freeboard plan
  • Control panel for watertight closures
  • Watertight compartments
  • Watertight sliding doors
  • Watertight hatch
  • Indication of ballast valves’ position
  • Communication system
  • Ballast pumps
  • Labelling of equipment and drawings
  • Ballast valves
  • Model testing
  • Tests of new anchoring system
  • Line stretch alarm

In addition, improvement points were identified relating to:

  • Drawings
  • Loading area supports
  • Use of the ballast system at secondary level
  • Negative airgap
  • Overview of solenoid valves
  • FMEA for the anchoring system
  • Anchor winch certificates

What happens next?

We have asked Odfjell to report on how the non-conformities and improvement points will be addressed by 14 November 2019.

For us to issue an AoC, all known safety-critical non-conformities must be rectified and the facility must have been issued with maritime certificates from the relevant flag state.