DNV grants AiP for MSC's ammonia-powered 21,700 TEU container ship, marking a milestone in zero-carbon shipping.
On December 12, 2025, at 11:22, the classification society DNV announced that MSC, in collaboration with the Zhoushan Changhong International and CIMC ORIC consortium, has received Approval in Principle (AiP) for the design of a 21,700 TEU capacity, ammonia-powered, dual-fuel ultra-large container ship.
This AiP represents a significant milestone in the advancement of zero-carbon mainline container shipping. The vessel will feature next-generation ammonia dual-fuel engines and large C-type ammonia tanks.
The hull design incorporates vertical bows, optimized stern and hull lines, low-resistance coatings, high-efficiency propellers, and hydrodynamic features aimed at enhancing fuel efficiency. Design validation has been conducted through CFD simulations and model tests.
CIMC ORIC General Manager Yin Xunbin stated that this approval confirms the consortium's commitment to developing future-ready vessels that reduce emissions and meet global trade demands.
DNV experts reviewed the design according to international standards covering fuel systems, propulsion, and ammonia safety. The AiP paves the way for detailed engineering studies and a potential commercial construction process compliant with DNV rules.
DNV Vice President Norbert Kray noted that ammonia dual-fuel options are transitioning from the concept phase to ordering and soon to delivery. He added that the approval increases confidence in ammonia fuel as a viable option for large container ships.
The design has been optimized for a high cargo-to-capacity ratio and efficient hold usage. The twin-island deck layout and forecastle design allow for the addition of extra 40-foot container slots while maintaining port compatibility. As the project progresses, further safety analysis and fuel system integration are planned.
Source: www.denizhaber.com