Home NR669 - Recognition of non-destructive testing suppliers This Rule Note gives the applicable requirements for firms providing Non-Destructive Testing (NDT) services on ship and offshore structures/components subject to classification. Reference Title Edition NR669 R00 Recognition of non-destructive testing suppliers Jul 2020 check related documents: NR216 Rules on materials and welding for the classification of marine units Check other Bureau Veritas rules and guidelines.