NR493 Mooring systems for offshore units

This Rule Note provides requirements for the classification of mooring systems and gives technical requirements, criteria and guidance on the design, construction and installation of the mooring systems.

ReferenceTitleDate
NR493 R05Mooring systems for offshore unitsMarch 2026


Check the list of main changes.

Check other Bureau Veritas rules and guidelines, including:

  • NR445 Rules for the classification of offshore units
  • NI604 Fatigue of top chain of mooring lines due to in-plane and out-of-plane bendings
  • NI432 Fibre ropes for offshore services