Decarbonisation in maritime industry can be possible by considering renewable sources of energy or various novel technologies for improving the environmental footprint. The established strategy and the respective regulatory framework are pushing hard towards this direction, while the European Union (EU) introduces regulations and initiatives to accelerate the transition. Each decarbonisation effort should be closely examined both in terms of emissions and cost in order to prove its benefits to the environment and ship owner, respectively. Uncertainties should be carefully considered, especially when it comes to carbon pricing and fuel prices. This paper lays the path towards life-cycle assessment and costing for alternative fuels and emission reduction technologies, while an indicative case study is qualitatively considered.

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