This study investigates the transition to a sustainable shipping industry within the framework of the IMO’s 2050 carbon neutrality objective, focusing on sociotechnical systems analysis. This research delves into the sustainable paradigm shift towards alternative marine fuels, such as LNG, methanol, ammonia, and hydrogen, from a sociotechnical transition perspective, analyzing the multilevel perspective challenges and opportunities. Specifically, it scrutinizes the implications of adopting these alternative fuels for global shipping, identifying technical uncertainties, financial constraints, and infrastructure needs. Through a comprehensive review of the existing literature on ship emissions and alternative fuels, coupled with sociotechnical transition theory, this study addresses the multifaceted challenges and opportunities in meeting the IMO’s environmental objectives. It emphasizes the necessity of collaborative governance, innovative niche strategies, and a holistic approach to leverage the current window of opportunity in facilitating the maritime industry’s transition to sustainable fuel options. Finally, this research enhances our understanding of the intricate interplay between technological, social, industrial, and cultural dynamics in the greening of shipping, and offers insights into the strategic adoption of environmentally friendly marine fuels for a sustainable future.