Attached is an insightful read by Deloitte on hydrogen (and ammonia as hydrogen carrier). Not exclusively focussed on maritime but you will find some interesting observations if you search for “shipping” in the document.
Deloitte does not expect any significant hyrogen demand of the shipping sector before 2030.
Note the infographic (figure 19) on page 20 which illustrates the substantial energy losses associated with hydrogen transport.
gx-deloitte-global-hydrogen-report.pdf (16.6 MB)