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Acknowledgement of Compliance (AoC) verification of contingency preparedness Transocean Arctic

On 29 April 2004 the Petroleum Safety Authority Norway (PSA) undertook a verification activity on board the drilling installation Transocean Arctic during a shipyard stay at Westcon in Ølen Municipality.


The activity was directed at steering systems and technical matters in the sphere of contingency preparedness.

Background to the supervision

Transocean Arctic is a semi-submersible drilling installation built in 1986 by Mitsubishi Heavy Industries, Japan. It had been operating on the Norwegian Shelf for a long time until laid up in Ølen in February 2002.

Transocean Offshore (TO) has requested a Acknowledgement of Compliance (AoC) for the installation. The company is planning to start activity on the Norne field for Statoil with planned start-up around 1 August 2004. In this connection, during the shipyard stay in Ølen there will be considerable upgrading of the installation. Some of this activity is being done to meet requirements in the regulations (authority requirements), while some technical modifications to equipment and systems are performed to meet the requirements of the contract between Statoil and TO. Before any consent to activity on the Norne field can be given, the PSA must issue an AoC for the installation.

The purpose of the supervision

The purpose of this activity is to verify whether the steering and technical conditions in the discipline of contingency preparedness on Transocean Arctic comply with authority requirements.

The result of the supervision

Planned modifications to Transocean Arctic will contribute to raising the HSE level on the installation. Before the installation is ready for operation, an extensive programme of maintenance and testing of systems must be completed, plus training and drills for the crew. TO is planning to complete such a programme in the course of the shipyard stay in Ølen.

During the verification the installation was unmanned by operational personnel, and the requirements as to qualifications and familiarisation, training and drills, were therefore verified only to a very small extent.

It will be a challenge for the company to commission the installation (with the necessary documentation) for operation and at the same time ensure that the authority requirements in the said areas are complied with.

No new non-conformances in the discipline of contingency preparedness were uncovered during the verification.

Information on our follow-up after the audit

Contact in the Petroleum Safety Authority Norway

Anne Vatten