Small craft - Stability and buoyancy assessment and categorization - Part 3: Boats of hull length less than 6 m (ISO 12217-3:2022); German version EN ISO 12217-3:2025

This technical specification addresses the stability and buoyancy assessment and classification for small craft, specifically targeting vessels with a length of less than six meters. It establishes the fundamental principles and technical requirements necessary to ensure safe operation under various loading conditions and environmental scenarios. The document outlines methodologies for calculating critical parameters such as freeboard, reserve buoyancy, and stability criteria tailored to the unique characteristics of smaller recreational and utility boats. By defining clear thresholds for stability performance, it supports manufacturers and classification bodies in verifying that designs meet minimum safety standards. The scope includes guidance on determining intact and damaged stability, as well as criteria for classification based on intended use and passenger capacity. This specification is derived from international consensus to harmonize safety expectations across different markets while accounting for regional regulatory frameworks. It provides a structured approach for evaluating vessel behavior in waves and wind, ensuring that operational limitations are clearly identified and communicated. Adherence to these guidelines helps mitigate risks associated with capsizing or swamping, contributing to overall maritime safety for small craft operators and owners.