“…Currently, diesel represents 95% of marine fuels used. Alternative options, such as green hydrogen—comprising compressed hydrogen (CH 2 ) and liquid hydrogen (LH 2 )—combined with Proton Exchange Membrane (PEM) fuel cells, hold promise for providing zero-emission power as a replacement for diesel [ [8] , [9] , [10] , [11] , [12] , [13] ].…”