No experience with this brand, but have used both Reflex and Dickenson pot type marine
heaters for many years on 2 of my yachts.
I've had a look at the manual for the smallest of the "camp" heaters. Its possible it would work
on a yacht, but a) these are not stainless steel
and would rust quickly b) the draft
requirement is for a minimum 8ft. long chimney which might be difficult to live with on a yacht. Assuming the unit was mounted on the cabin sole
with 6ft to the cabin
top, that would mean around 3ft of external chimney c) there is no provision for a booster fan to get the draft
going during the initial startup when the chimney is cold. The Dickenson and Reflex have that capability.