| Standard | Focus | When to use alongside ST-N001 | |----------|-------|-------------------------------| | | Mobile offshore drilling units | For jack-up or semi-submersible stability during transit. | | EN 12079 / DNVGL-ST-E271 | Offshore containers & lifting sets | For certification of spreader bars, pallets, baskets. | | API RP 2A | Fixed offshore structures | For seabed foundation interaction during immersion. | | ISO 19901-6 | Marine operations – oil & gas | Almost identical to ST-N001, but ISO has different safety factors. Do not mix. |
: Criteria for "wet tows" (vessels in the water) and "dry tows" (on a transport ship), including stability and seafastening. dnvgl-st-n001 pdf
This section lays the foundation. It covers the risk-based approach to marine operations. Unlike prescriptive standards, DNVGL-ST-N001 asks operators to define and Hazardous Events . Key subsections include: | Standard | Focus | When to use
| Topic | What it addresses | |-------|-------------------| | | Wave, wind, current limits; joint probability; return periods | | Vessel & equipment suitability | Stability, seakeeping, station-keeping, lifting capacity, towing | | Lifting operations | Slings, shackles, lift points, dynamic amplification factors, single vs. multi-crane lifts | | Subsea installation | Lowering through splash zone, seabed landing, subsea lifting | | Towage & transit | Towline forces, barge stability, route assessment | | Ground transport | Skidding, roller systems, load-out by SPMT | | Flooding, ballasting, de-ballasting | For float-over installations or launch operations | | Operations manuals & risk assessment | Required documentation, checklists, failure mode analysis | | | ISO 19901-6 | Marine operations –
This standard addresses marine operations occurring during the development or decommissioning of offshore assets. It is the "go-to" technical reference for ensuring that risks are reduced to an acceptable level, which is critical for securing marine insurance and obtaining a .
A critical note for engineers: Always use the official version. Do not rely on random file-sharing websites for your download. Here is the correct workflow: