The groundbreaking achievement of achieving Approval in Principle (AiP) for the retrofit design of a 174,000 LNG carrier (LNGC) to run on ammonia-fueled gas turbine has significant implications. This milestone demonstrates the viability of real-world implementation as a blueprint for transforming vessels into eco-friendly alternatives in compliance with IMO decarbonization mandates. The focus on ensuring safety, reliability, and economic feasibility highlights the strategic approach to meeting environmental goals in the maritime industry.