Home NR583 Whipping and springing assessment This Rule Note deals with the part of structural analysis which aims at performing ultimate strength and fatigue assessment based on direct hydro-structure calculations including Whipping and Springing response. Reference Title Date NR583 R01 Whipping and springing assessment July 2015 CHECK RELATED DOCUMENTS: NR467 Rules for the classification of steel ships NR625 Structural rules for container ships Check other Bureau Veritas rules and guidelines.