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IMCA revises DP vessel documents

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Two highly respected International Marine Contractors Association (IMCA) documents, often written into contracts by clients, have been fully revised and published. dzԹGuidelines for the Design and Operation of Dynamically Positioned VesselsdzԹ (IMCA M103 Rev 2), and dzԹGuidance on Failure Modes & Effects Analyses (FMEA)dzԹ (IMCA M166 Rev 1) are both now freely available on the IMCA website.

dzԹBoth important documents were reviewed using the IMCA dzԹopen forumdzԹ web-based system introduced last year,dzԹ explains IMCAdzԹs Technical Director, Richard Benzie. dzԹThis made for wide stakeholder engagement. All comments were welcomed and taken on board, so M103 and M166 can rightly be described as dzԹupdated by the wider industry for the industrydzԹ.

dzԹdzԹGuidelines for the Design and Operation of Dynamically Positioned VesselsdzԹ (IMCA M103) has undergone a major re-write and now includes generic design and operational guidance, as well as vessel type-specific guidance for 17 representative vessel types that utilise dynamic positioning (DP) in support of the offshore oil and gas and offshore energy industries dzԹ a feature we know the industry was eager to have included.

dzԹThe design guidance, based on IMO Circular MSC 645, focuses on the methods for creating fault-tolerant DP systems based on the principles of redundancy; operational guidance focuses on current good industry practice and draws from existing operational guidance from industry.

dzԹThe vessel type-specific guidance focuses on the industrial mission of the vessel and the impact that this has on its design and operation. A brief description of the industrial mission is included for each vessel in order to better explain the technical and operational guidance and to give an indication of the risks associated with an inability to maintain position.

dzԹWe are confident that M103, which was last revised in 2007, is right for the current era of DP vessels, and can be easily modified when needed, thanks to our decision to produce only pdf versions of all guidance documents,dzԹ he adds.

Focusing on M166

A failure modes and effects analysis (FMEA) is an easy to use yet powerful proactive engineering quality tool that assists in the identification and countering of weak points in the early design phase of products and processes.

The dzԹGuidance on Failure Modes & Effects Analyses (FMEA)dzԹ (IMCA M166 Rev 1) guidance document was commissioned by IMCA to highlight industry good practice in the use of FMEA techniques when applied to the technical systems associated with offshore vessels, in particular DP systems. It is an update of the original document IMCA M166, which was published in 2002. The four sections and appendices are designed to be read separately or as a single document.

dzԹThe document explains the history and development of FMEA and the role of FMEA in classification,dzԹ explains Richard Benzie. dzԹSpecifying an FMEA, the depth of FMEA reporting, the procedures used and the format of the final FMEA report are discussed. The additions to the FMEA process, which can complement the analysis and the benefits of subjecting non-redundant systems to FMEA, are also briefly explored.

dzԹWe look forward to industry feedback on both M166 and M103.dzԹ

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