Insights
RPEQ Mooring Approval

RPEQ Mooring Approval

August 12, 2021

The operational and legal risk associated with moorings can be substantially mitigated with sign off from RPEQ Engineers. So, it is good to see some regulatory authorities on the East Coast requiring sign-off of moorings from RPEQ engineers. GBMPA requires RPEQ sign off on Great Barrier Reef moorings and the Gold Coast Water Authority (GCWA) […]

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Grappling with Cyclone Moorings in Australia

December 16, 2019

Cyclone moorings hold vessels safely on station throughout the most extreme of Australian storm events. That is a big ask and raises many issues. It would be a huge contribution to constructive discussion if the number of incidents related to their use, misuse and failures were freely available, but I can’t see port authorities nor […]

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Analytical Approaches Ship to Ship Moorings

January 29, 2019

For the past 10 years, ONA Consultants has developed and engineered ship to ship mooring procedures, gaining a nuanced understanding of their complexities and challenges. Our experience includes many barge to construction vessel scenarios, deep sea mooring to offtake bulk carriers on higher sea states, and in some cases -assessment of the use of DP […]

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ONA are proud to be awarded Lloyds ISO 9001:2015 Certification

September 10, 2018

ONA Consultants is proud to be awarded ISO 9001:2015 certification, an internationally recognized standard that ensures that our services meet the needs of our clients through an effective Quality Management System (QMS). ONA takes quality seriously at all levels of the business and are all about continuous improvement. The new ISO 9001 standard better allows […]

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Importance of Weight Control and Management in the Marine Transport and Installation Domain

July 5, 2018

The following Insight from Mike Priestly, Senior Consultant, discusses the importance of weight control and management in the marine transport and installation domain: My experience on projects over the last couple of years has revealed huge opportunities for better weight management and less cost and risk in project work scopes. During the past 10 years […]

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Mega Projects – Mega Windages and Position Keeping

January 24, 2018

The following Insight from Mike Priestly, Senior Consultant, explores the effect of large windages on the nature of position keeping two of the largest floating facilities ever built: Last year, two of the largest facilities in each class were installed in the Northern waters of Australia, the Inpex Ichthys CPF “Ichthys Explorer” and Shell FLNG […]

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Operational Risk Assessments-Incident Commentary

November 25, 2017

The following Insight from Mike Priestly, Senior Consultant, provides incident commentary on the Spirit of Tasmania II parting of moorings: Background On 13 January 2016 The Spirit of Tasmania II broke from her moorings while loading vehicles and passengers at Station Pier Melbourne. The ATSB recently published a report of its investigation (link). Purpose ONA […]

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Shipyard Risk Assessment and JH143 in Australia

September 4, 2017

The following Insight from Mike Priestly, Senior Consultant, explores the use of the JH143 in Australia when conducting risk assessments of shipyards: Historical Context Australia has a long and proud history of shipping and boating around Australia’s enormous coastline. Many of us grew up near marine infrastructure such as boatsheds and slipways. Some had nice […]

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Integrity Assessment of Gravity Anchors – Re-Lifing Approach

August 15, 2017

The following Insight from Jordan Rayson, Offshore Engineer, explores the integrity assessment of gravity anchors: Gravity-based anchors remain an acceptable anchoring method in mooring systems around the world. There are two prominent types of gravity-based anchors: steel and concrete. Both rely on keying into the seafloor and the use of ballast or overburden to enhance […]

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