IACS Archives - The International Institute of Marine Surveying (IIMS)

IACS publishes new Unified Requirement on ammonia release mitigation systems

Posted on February 2, 2026February 2, 2026 by News Hound

IACS, the International Association of Classification Societies, has released a new Unified Requirement (UR H2) establishing a comprehensive safety framework for ammonia release mitigation systems (ARMS) on ammonia-fuelled ships.

The UR provides harmonised requirements for the design, testing and certification of ARMS intended to manage ammonia releases during normal operations and foreseeable abnormal scenarios. Continue reading “IACS publishes new Unified Requirement on ammonia release mitigation systems”

IACS publishes 2024 Annual Review

Posted on March 31, 2025October 15, 2025 by News Hound

IACS, the membership organisation for the world’s leading classification societies, has published its 2024 Annual Review, which highlights the central role played by IACS in supporting safety standards in global shipping.

In a year that marked the 50th anniversary of the adoption of the SOLAS Convention, safety was at the forefront of IACS’s work programme for 2024. This was exemplified by the new Safe Digital Transformation Panel, which began its important work to identify and mitigate any safety risks posed by shipping’s ongoing digital transformation. Continue reading “IACS publishes 2024 Annual Review”

IACS 2025 Blue Book is available to download

Posted on January 23, 2025February 27, 2025 by News Hound

The International Association of Classification Societies has issued the IACS 2025 Blue Book, further enhancing its technical support for the shipping industry through investments in technology, innovation, and research and development at both the classification and statutory levels.

The IACS 202 Blue Book is a comprehensive electronic library of technical resolutions adopted by IACS as part of its ongoing technical work. It serves as the Association’s primary reference, containing historical data and all previous revisions of IACS publications. Published and updated annually, the Blue Book demonstrates how IACS fulfils its mission to benefit international shipping. It includes: Continue reading “IACS 2025 Blue Book is available to download”

IACS interpretation on hydrocarbon gas detection

Posted on November 25, 2024April 25, 2025 by News Hound

IACS published a new UI SC307 on hydrocarbon gas detection and bilge high level alarms

The International Association of Classification Societies (IACS) published a new Unified Interpretation UI SC307 on hydrocarbon gas detection and bilge high level alarms in cargo pump-rooms. The UI is set to be implemented by IACS societies on ships contracted to be built on or after 1 January 2026.

The interpretation says:
1. Characteristics of the cargoes and their vapors (flammability, density, etc.) should be taken into consideration to determine the type and arrangement of detectors. Continue reading “IACS interpretation on hydrocarbon gas detection”

IACS guidance on CO2 fire extinguishing systems in alcohol-fuelled ships

Posted on November 6, 2024November 20, 2025 by News Hound

The International Association of Classification Societies (IACS) has released a Unified Interpretation on CO2 fire extinguishing systems in alcohol-fuelled ships machinery spaces.
Within the update it states machinery space and fuel preparation space where methyl/ethyl alcohol-fuelled engines or fuel pumps are arranged should be protected by an approved fixed fire extinguishing system in accordance with SOLAS regulations. The system should also be able to extinguish methyl/ethyl alcohol fires.
The interpretation says that where CO2 is used to suppress Continue reading “IACS guidance on CO2 fire extinguishing systems in alcohol-fuelled ships”

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