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Dynamic positioning audits are carried out on all types of drilling rigs and offshore vessels, including diving support, heavy lift, pipe laying, trenching and ROV support vessels, to ensure "fitness for purpose" for each particular workscope.
DP audits and sea trials are designed to identify any potential "single point failures" which, if occurring when the vessel is operating on DP, could cause the vessel to move from its intended position and threaten the safety of the operation.
Furthermore, DP audits and trials help to prove the position keeping capability of the system.
If any failure modes are found, recommendations are made either to modify the system, if practical, or to adapt the operational procedures relevant to the workscope.
The methodology used is to industry standards and has been comprehensively enhanced through knowledge gained from experience and incident analysis.
This type of analysis follows the guidelines contained in BS 5760: Part 5: 1991, US Department of Defence MIL STD 1629A, IMO MSC 645 and those published by IMCA, a number of whose guidance documents have been developed by Wavespec.
An extension of the FMEA, the FMECA (which involves the critically aspect of failure of a component part of a system) can also be carried out. This allows specific recommendations to be made on how reliability can best be improved, which is particularly useful in the case of limited budgets.