ISO 24409-4:2023

Overview

ISO 24409-4:2023, published by the International Organization for Standardization (ISO), addresses the design, location, and use of shipboard escape plan signs used for general emergency information on ships. This international standard sets the principles to ensure that escape plan signs are clear, effective, and consistent, with a focus on providing vital information to passengers and non-crew personnel. It covers signs to be displayed in cabins and public areas, as required by maritime regulations, supporting safe evacuation and response during emergencies such as fire or other hazardous situations. Crew-specific plans are addressed separately under ISO 17631.

Key Topics

• Design Requirements: The standard outlines size, orientation, and graphical representations for escape plan signs. Each sign must:
  • Clearly indicate primary and secondary escape routes.
  • Feature a “you are here” indication for location orientation.
  • Be durable, legible, and oriented according to placement.
  • Incorporate essential safety notices, lifejacket donning instructions, and explanations of symbols.
• Content Specifications: Escape plan signs must include:
  • Ship side and plan views, showing relevant escape pathways and assembly or embarkation stations.
  • Color-coded routes and standardized symbols for vital safety and emergency equipment.
  • Multilingual content, including mandatory English text and any other flag state languages.
• Materials and Durability: Signs should use materials resistant to marine conditions, maintaining legibility throughout their lifespan.
• Illumination: Adequate lighting is mandated, including the use of photoluminescent materials or emergency lighting, to ensure visibility even during power loss.
• Inspection and Revision: Regular inspection-at least annually and after any ship modifications-is required to guarantee that all signs are up to date and effective.

Applications

ISO 24409-4:2023 is directly applicable to all types of passenger ships, ferries, cruise liners, and other vessels where the safety of travelers is paramount. Practical applications include:

• Cabin Installations: Placement of escape plan signs inside individual cabins to guide occupants toward assembly stations in emergencies.
• Public Area Signage: Displaying comprehensive plans in corridors, assembly stations, elevator lobbies, dining areas, and recreational spaces to assist large groups in understanding evacuation procedures.
• Training and Drills: Supporting safety briefings and evacuation drills by providing standardized, easily understood emergency instructions.
• Compliance with Regulations: Helping ship operators align with IMO SOLAS requirements and other international maritime safety regulations regarding signage and passenger information.

By implementing this standard, ship operators ensure consistent communication of emergency escape information, minimizing confusion and improving the chances of safe evacuation.

Related Standards

ISO 24409-4:2023 is part of a series dedicated to shipboard safety signs and markings. For complete compliance and effective implementation, consider the following related standards:

• ISO 24409-1: Design principles for overall shipboard safety signs and markings.
• ISO 24409-2: Catalogue of standardized safety signs for use aboard ships.
• ISO 24409-3: Code of practice for application and use of shipboard safety signs.
• ISO 17631: Guidance on shipboard plans for fire control, damage control, life-saving appliances, and means of escape (crew-focused).
• ISO 3864-4 & ISO 7010: Standardized colors and safety sign symbols.
• ISO 17398: Specifications for performance and durability of safety signs.
• ISO 15370: Guidance relating to low-location lighting on passenger ships.
• IMO Resolution A.1116(30) and SOLAS regulations: International maritime guidelines and conventions relating to signage and emergency preparedness.

Conclusion

Adhering to ISO 24409-4:2023 ensures clear, compliant, and reliable shipboard escape plan signs that enhance passenger safety and support regulatory requirements, making it an essential standard for modern marine operations.