The standard is available for download in PDF format from the DNV GL website or other online platforms that provide access to technical standards.
DNVGL-ST-N001 PDF
After conducting research, I found that "DNVGL-ST-N001" refers to a standard from DNV GL (Det Norske Veritas and Germanischer Lloyd), a leading international classification society. dnvgl-st-n001 pdf
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A very specific topic!