Seadrill has applied for Acknowledgement of Compliance (AoC) for West Mira.

In connection with an AoC application, the PSA conducts audits within selected specialist domains. From 24 to 28 May 2019, we carried out an audit of Seadrill’s management and follow-up of the working environment on West Mira.

During the audit, the facility was in the process of being prepared for operation on the NCS. The facility will be owned and operated by Seadrill Europe Management AS. West Mira is a semi-submersible facility of the Moss CS60 design.


The objective of the audit was to monitor the status of conformity assessments of the facility’s technical condition, organisation and management systems relative to the regulatory working environment requirements for West Mira.


Four non-conformities were identified in connection with:

  • Areas for handling drilling mud and cuttings
  • Follow-up of ergonomic factors
  • Design of paint booth
  • Design of driller’s cabin

In addition, an improvement point was identified relating to the chemical working environment in the galley.

What happens now?

We have asked Seadrill to report on how the non-conformities and improvement point will be addressed by 24 July 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.