ISO 12217-1-2022 PDF

Full title and description

Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-sailing boats of hull length greater than or equal to 6 m. This International Standard specifies methods for evaluating intact (undamaged) boats for stability and buoyancy and for assigning a design category (A, B, C or D) appropriate to the boat’s design and maximum total load.

Abstract

ISO 12217-1:2022 defines analytical and test-based procedures to assess hydrostatic properties, resistance to swamping, and intact stability for non‑sailing small craft with hull lengths ≥ 6 m (up to 24 m). The assessment enables assignment to design categories A–D and includes provisions for multihulls (inversion susceptibility, means of escape and inverted flotation). The document also identifies exclusions and interfaces with related standards for inflatable craft, watertight/quick‑draining recesses and other small craft equipment.

General information

• Status: Published
• Publication date: 16 December 2022 (ISO edition 4, published December 2022)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 47.080 (Small craft)
• Edition / version: Edition 4 (2022)
• Number of pages: 76

Scope

Specifies methods to evaluate the stability and buoyancy of intact non‑sailing boats of hull length greater than or equal to 6 m (principally applicable up to 24 m). Covers assessment of susceptibility to swamping, flotation characteristics, and criteria to assign a design category (A, B, C or D). Includes special provisions for habitable multihulls (inversion and inverted flotation). Excludes inflatable and RIBs covered by the ISO 6185 series (except where cross‑referenced), personal watercraft, certain small craft types (canoes, kayaks, aquatic toys), hydrofoils/hovercraft out of displacement mode and submersibles. Does not address effects of towing, fishing, dredging or lifting operations.

Key topics and requirements

• Methods for hydrostatic calculations and intact stability assessment (incl. righting lever curves and residual stability checks).
• Criteria and procedures to assess susceptibility to swamping and to determine flotation characteristics when flooded.
• Assignment of design categories A, B, C or D based on evaluated stability and maximum total load.
• Special requirements for habitable multihulls: inversion assessment, viable escape routes, and requirements for inverted flotation.
• Limits of applicability (hull length ranges, exclusions such as inflatable boats covered by ISO 6185 and personal watercraft covered by ISO 13590).
• Interfaces and normative references to related standards (e.g., quick‑draining recesses, principal data, windows/hatches, seacocks).

Typical use and users

Used by naval architects, boat designers and manufacturers to demonstrate compliance for recreational and small commercial non‑sailing craft. Also used by classification societies, conformity assessment bodies, testing laboratories, regulatory authorities and notified bodies assessing design category and safety documentation (including materials for owner’s manuals and EU/region regulatory conformity where applicable).

Related standards

Part of the ISO 12217 series; closely related documents and references include ISO 12217-2 (sailing boats), ISO 12217-3 (boats < 6 m), ISO 6185 series (inflatable boats), ISO 11812 (watertight or quick‑draining recesses and cockpits), ISO 8666 (principal data), ISO 12216 (windows, portlights, hatches, deadlights and doors), ISO 12215 series (hull construction and scantlings), ISO 14946 (maximum load capacity) and ISO 9093 (seacocks and through‑hull fittings). The standard aligns with commonly used recreational craft regulatory frameworks for design categories and stability assessment.

Keywords

stability, buoyancy, small craft, non‑sailing boats, design category, swamping, inversion, multihull, hydrostatics, intact stability, ISO 12217, safety assessment

FAQ

Q: What is this standard?

A: ISO 12217-1:2022 is the part of the ISO 12217 series that specifies methods to assess the stability and buoyancy of intact non‑sailing small craft with hull lengths ≥ 6 m and to assign a design category (A–D).

Q: What does it cover?

A: It covers hydrostatic calculations, intact stability criteria, assessment of susceptibility to swamping, flotation when flooded, categorization to design classes A–D, and special provisions for habitable multihulls (including inversion and inverted flotation). It excludes craft specifically covered by other standards (e.g., many inflatables and personal watercraft).

Q: Who typically uses it?

A: Naval architects, boat builders and manufacturers, classification societies, test laboratories, conformity assessment bodies and regulatory authorities use it to evaluate and document stability and buoyancy for certification, design verification and regulatory compliance.

Q: Is it current or superseded?

A: ISO 12217-1:2022 is the current published edition (Edition 4, published December 2022) and supersedes the 2015 edition.

Q: Is it part of a series?

A: Yes. ISO 12217 is a multipart series. Relevant companion parts include ISO 12217-2 (sailing boats) and ISO 12217-3 (boats under 6 m); the series interfaces with other small craft standards such as ISO 6185, ISO 11812 and ISO 8666.

Q: What are the key keywords?

A: Stability, buoyancy, small craft, design category (A/B/C/D), swamping, inversion, hydrostatics, intact stability, multihull.