On 28 and 29 May 2013, the Petroleum Safety Authority Norway (PSA) conducted an audit of Diamond Offshore in connection with the stability, buoyancy and ballasting of Ocean Vanguard rig.
The objective of the audit was to verify that Diamond Offshore had good systems for stability, buoyancy and ballasting in accordance with regulatory requirements.
No non-conformities were identified. Improvement points were identified in connection with: risk analyses; stability calculations; use of bolsters; documentation of training.