[bobthepanda]

I mean at minimum you need to run an actual kitchen to feed people for days or weeks at sea.

[eptcyka]

You mean? Yes. Yes, you'll need to have a crew and you'll need to need to ship the necessities, which eats into the efficiency of this mode of transport. However, a plane will create 40 times more CO2 for the same amount of cargo transported than a ship. I'd say we can figure out how to fit a larger crew and more supplies in that margin.