Hello Denis,

However you decide to make your coffee, consider keeping it
hot in a thermos. Maybe even two small ones. It will remain
almost too hot to drink for maybe 4-5 hours if unopened.
Less if it is opened.

There are stainless steel types that are quite robust.

Some will argue that the coffee suffers somewhat when stored
in a thermos and I will not disagree. But unless you are on
a substantial vessel, the opportunity to enjoy a cup when
you want (or need) it, rather than when you are able to make
it, is priceless!

Good luck.

Chuck

Denis Marier wrote:
I wonder what is the best way to make coffee while sailing alone.
TIA