ISO 19901-1 acts as a foundational document within the wider series. It is often used in conjunction with: ISO 19901-3 : For topside structures. ISO 19905-1 : For the site-specific assessment of jack-ups.
: Determining current velocity and direction relative to vessel headings or fixed structures.
: Spectral density and wave height determination for site-specific assessments.
: Considerations for water levels, air and sea temperatures, and ice (though specific arctic requirements are deferred to ISO 19906 ). Relationship to Other Standards
The standard serves two main purposes in offshore engineering:
: These are rare, high-impact events used to ensure the structure can withstand severe storms or environmental anomalies without failure. Parameters Covered
: These are frequent events expected during the standard service life of a structure, used primarily for operational planning and fatigue analysis.
ISO 19901-1 focuses on defining two distinct types of environmental conditions: