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Audit of marine systems on Transocean Leader

On 15 and 16 April 2004 the Petroleum Safety Authority Norway (PSA), with assistance from the Norwegian Maritime Directorate (NMD), conducted an audit of the marine systems on the mobile drilling installation Transocean Leader (photo). The audit concerned the technical marine areas, including stability, ballast system, weathertoght and watertight integrity, emergency power supply, and mooring and rescue means.


The audit was conducted through interviews with Transocean personnel and verifications on board.

Background for the audit

Transocean has applied for an Acknowledgement of Compliance (AoC) for the mobile drilling installation Transocean Leader.

Measuring the installation's technical condition against current regulatory requirements is part of the AoC process.

Transocean's AoC application for Transocean Leader is based on Section 3 of the Framework Regulations. This section allows an installation registered in a national ship register and which follows a maritime operation concept, to use the NMD's regulations and supplementary classification rules stipulated by Det Norske Veritas (DNV) for relevant technical requirements.

In this connection the marine areas mentioned above will come under relevant technical requirements as defined in Section 3 of the Framework Regulations.

Purpose of the audit

The goal of the activity was to verify the information in the AoC application from Transocean, and to verify whether the installation meets relevant regulatory requirements in the area of marine systems.

Result of the audit

The audit uncovered new deviations that had not been identified in the AoC application.

Observations have also been noted as regards areas with an improvement potential.

The installation was not in operation during the verifications. It was therefore not possible to fully verify the requirements for competence and familiarization of personnel.

We would point out that Transocean is responsible for ensuring that operative personnel on board has the necessary competence and sufficient training in their respective areas of responsibility when operations start.

Contact person in the PSA:
Mike Theiss