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As of late 2023, a significant development in ship propulsion engines is the increasing adoption of alternative fuels and hybrid systems to enhance sustainability. Innovations include the use of ammonia and hydrogen as zero-emission fuels, alongside advancements in battery technologies for hybrid propulsion systems. These developments aim to reduce greenhouse gas emissions and comply with stricter international regulations on maritime emissions, reflecting the industry's shift towards greener technologies. Additionally, research into wind-assisted propulsion and energy-saving devices is gaining traction to further optimize fuel efficiency.

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