Diver and ROV based concrete mattress handling, deployment, installation, repositioning and decommissioning

Version history

February 2024 Rev. 2 – Updated to include systems for handling multiple concrete mattresses

December 2023 Rev. 1.1 – Page 2, headers, footers, figures & document map updated; no change to content

September 2011 Rev. 1 – Updated to include reference to the use of ROVs in mattress handling

November 2007 – Initial publication

Contents

• Introduction
• Glossary
• Purpose of this Guidance Note
• Safety and Environmental Issues
• Equipment
• Specification, Design and Fabrication of Concrete Mattresses
• Handling, Deployment, Installation, Repositioning and Decommissioning
• Anti-Scour and Fronded Mattresses
• References
• Appendix 1 – Tick-Box Checklists
• Appendix 2 – Example Drawings