I've never been on a liveaboard, so I'm not sure how much space is available.
I'm a coffee snob, roast my own beans, espresso machine, 2 grinders, french press, aero press, Harrio V60 for pour over, drink it black etc, etc.
I take my pour over grinder and the V60 with a few filters as it's the easiest and most compact, nice clean cup. I put everything in a milk cart anytime we go away. I also take an electric kettle, but a thermometer and a boiling pot of water would work. I don't use boiling water for coffee. Depending what kind of coffee it is, usually anywhere from 165f-185f (which is why the thermometer would be a must for me). To me, boiling water over extracts the coffee and it tastes bitter.
They make hand grinders, but a good one with consistent grind size can get expensive ($250-$300). They are really nice, and there's something about making coffee in the morning and enjoying the silence (my grinder kills that). I do not own a hand grinder, but a buddy of mine has one and he says it's great for going anywhere.
You'll get sub par coffee this way, it'll degrade a lot faster than beans freshly ground.
I will bring something I like, and also pick something up while I'm away for the same reason. It's a hit or miss (which is why I bring something I like).
Just realized the aero press would probably be more compact, but I tend to prefer the cleaner cup with the V60.
Are we not supposed to post in the woman's forum? If not, my apologies.
I just read my post.... I sound like an old man, lol.