Looks like it uses the small (5lb?) portable propane cylinders.
We use those on our boat all the time, as a lot of boaters do, for the BBQ.
Have to be careful with these, stow them outside of the cabin, and always check for leaks.
I have seen several products designed and marketed for camping that have and do work well on smaller boats.
Several boaters I have known use the coleman stove as well.
After all, weekend cruising on a pocket cruiser is just like camping on the water, right.
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White