ISO 12216:2020

Overview

ISO 12216:2020 - Small craft - Windows, portlights, hatches, deadlights and doors - Strength and watertightness requirements specifies technical requirements and test methods for openings and their coverings on small craft with a hull length (LH) up to 24 m (as defined in ISO 8666:2016). The standard addresses appliances that are critical to a craft’s watertightness, taking into account craft type, design category and the appliance location (for example Area I and Area IIa). Openings and non-opening devices fitted below Area I are excluded.

Key topics and technical requirements

• Scope and definitions: Clear definitions for openings, appliances, plates, glazing types and location areas (Clause 3).
• General requirements: Mandatory strength and minimum watertightness levels, and requirements to reference other international standards (Clause 4).
• Materials: Guidance and restrictions for plate materials including acrylics and glass (Clause 5).
• Appliance design and fastening: Requirements for plate end-connections, simply supported and semi‑fixed plates, fastening, glued plates, stiffeners and mechanical attachments (Clause 6).
• Area‑specific rules: Special provisions for appliances in Area I and Area IIa, flush-deck hatches, sliding appliances, washboards, deadlights, multihull escape hatches and prefabricated appliances (Clause 6.3).
• Strength assessment methods: Multiple assessment routes including direct calculation methods for monolithic and laminated plates, an advanced calculation method for certain non‑glazed plates, and pressure/test assessment methods (Clause 7).
• Tests and annexes: Normative test methods (Annex D) covering pressure and watertightness testing, mechanical link tests and impact resistance specifications (Annex E). Precalculated thickness tables and supporting informative annexes are included (Annexes A–F).

Practical applications - who uses ISO 12216:2020

• Boat and yacht designers and naval architects specifying glazed openings and hatch systems.
• Small craft manufacturers and component suppliers (windows, portlights, hatches, doors).
• Test laboratories performing strength, impact and watertightness testing.
• Classification societies, certification bodies and surveyors assessing compliance with safety and watertightness requirements.
• Regulatory bodies adopting standards for craft design categories and equipment safety.

Related standards

• ISO 8666 (small craft dimensions and LH definition)
• ISO 11336-1 (glazed openings for large yachts)
• ISO 11812 (watertight and quick-draining cockpits)
• ISO 12217 series (stability and buoyancy assessment)
• EN 356 / EN 1063 (security glazing tests)
• ISO 6603-1 (impact testing of rigid plastics)

ISO 12216:2020 is essential for ensuring that windows, portlights, hatches, deadlights and doors on small craft meet robust strength and watertightness performance criteria, and provides test methods and calculation approaches to demonstrate compliance.