It soulds like your installation may be OK. The model I saw the labe on might have been different, or maybe a different age.
Does yours have a flame failure device that shuts the gas off if the flame goes out?
Is the combustion chamber sealed? I don't think the Paloma is.
Does it have an oxygen depletion sensor that cuts off the gas when the oxygen in the space falls below 95% of the normal.
The flue should be sealed from the unit to the exterior. It doesn't look like yours is.
And, do you have a carbon monoxide detector in each sleeping cabin?
These are some of the things that are considered important for safe operation, from the ABYC Standards for small craft.