ISO 12217-2-2022 PDF

Full title and description

Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing boats of hull length greater than or equal to 6 m. This international standard specifies methods to evaluate intact stability and buoyancy, assess susceptibility to swamping and, where applicable, susceptibility to inversion for sailing boats, permitting assignment to design categories A, B, C or D according to design and maximum load.

Abstract

This part of ISO 12217 sets out procedures and test/calculation methods to assess the stability and buoyancy of sailing boats (primarily sail-propelled, may include auxiliary engines) with hull lengths from 6 m up to and including 24 m. It covers intact-boat stability, flotation characteristics relevant to swamping, assessment of inversion risk for habitable multihulls, and criteria for assigning a design category. It also defines exclusions (for example, inflatable/RIB boats covered by the ISO 6185 series, gondolas/pedalos, surfboards and hydrofoils operating out of displacement mode).

General information

• Status: Published
• Publication date: December 2022 (registered 16 December 2022)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 47.080 (Small craft)
• Edition / version: 4 (ISO 12217-2:2022)
• Number of pages: 88

Key bibliographic and lifecycle details are drawn from the ISO record for ISO 12217-2:2022 and distributor listings.

Scope

This document is principally applicable to sailing boats with hull length greater than or equal to 6 m and up to 24 m. It specifies methods for evaluating intact stability and buoyancy and flotation characteristics for boats susceptible to swamping, and it provides the basis for assigning a design category (A, B, C or D). The standard also addresses specific issues for habitable multihulls (including inversion susceptibility, viable escape routes and inverted flotation requirements). Exclusions include inflatable and rigid-inflatable boats covered by the ISO 6185 series, gondolas and pedalos, surfboards (including sailing surfboards), and hydrofoils or foil-stabilized boats when not operating in displacement mode. It does not evaluate operational effects such as towing, fishing or lifting operations.

Key topics and requirements

• Methods for determining intact-boat stability and buoyancy (calculation and test procedures).
• Criteria and procedure to assign a design category (A, B, C or D) based on stability/buoyancy characteristics and maximum load.
• Assessment of flotation and susceptibility to swamping; evaluation of quick-draining cockpit/recess provisions where applicable.
• Special requirements for habitable multihulls, including inversion susceptibility assessment and inverted flotation/escape criteria.
• Clear exclusions (for example, inflatable/RIB boats under ISO 6185, surfboards, certain hydrofoil modes).
• Normative references to related standards where specific features (e.g., quick-draining cockpits) are defined (for example ISO 11812 and others in the small-craft family).

These are derived from the standard's text and its normative references.

Typical use and users

Used by naval architects, yacht designers, small craft manufacturers, classification societies, conformity assessment bodies, testing laboratories and regulatory authorities to assess and document the stability and buoyancy performance of sailing boats. It is also used by technical consultants and advanced recreational-boat owners when verifying a design's suitability for intended waters and assigning the appropriate design category.

Related standards

ISO 12217 is a multi-part series; primary related parts include ISO 12217-1 (Non-sailing boats of hull length greater than or equal to 6 m) and ISO 12217-3 (Boats of hull length less than 6 m). Other related documents frequently referenced are ISO 11812 (quick-draining cockpits), the ISO 6185 inflatable-boat series, ISO 8666 (principal data for small craft) and standards on loads and maximum capacity (for example ISO 14946).

Keywords

stability; buoyancy; small craft; sailing boats; design category; swamping; inversion; multihull; ISO 12217; ISO/TC 188; quick-draining cockpit; flotation; safety; A B C D categories.

FAQ

Q: What is this standard?

A: ISO 12217-2:2022 is the part of the ISO 12217 series that specifies methods to assess the intact stability and buoyancy of sailing boats (hull length ≥ 6 m and ≤ 24 m) and to assign a design category based on performance and maximum load.

Q: What does it cover?

A: It covers calculation and test procedures for intact stability and buoyancy, flotation criteria related to swamping, and specific provisions for habitable multihulls including inversion susceptibility and inverted flotation/escape requirements. It explicitly excludes certain craft types (inflatable/RIB, pedalos, surfboards, hydrofoils not in displacement mode) and does not address operational activities such as towing or lifting.

Q: Who typically uses it?

A: Naval architects, designers, manufacturers, testing labs, certification bodies, classification societies and regulators use the standard to demonstrate compliance, document stability performance and assign an appropriate design category for sailing boats. Owners and technical advisers also use it for safety assessment and design verification.

Q: Is it current or superseded?

A: ISO 12217-2:2022 is the current published edition (fourth edition, December 2022) and replaces earlier editions (for example the 2015 edition). The ISO record lists the 2022 edition as published and in force.

Q: Is it part of a series?

A: Yes — ISO 12217 is a series addressing stability and buoyancy assessment and categorization for small craft. Companion parts include ISO 12217-1 (non-sailing boats ≥ 6 m) and ISO 12217-3 (boats < 6 m), among other related documents.

Q: What are the key keywords?

A: Stability, buoyancy, small craft, sailing boats, design category, swamping, inversion, multihull, quick-draining cockpit, ISO 12217.