I'll get to that in the smart papers. Don't think I want to know badly enough to go back. But, I'll find out tomorrow. Lots of reading time. I ran into another Sightseer last weekend. The owner was happy to explain systems I asked about.
I did read in the PDF that raising the thermostat by 5 degrees in heat mode would make the propane furnace come on. The Captain likes instant heat gratification so she may have goosed it and the heat in the floor was from the gas furnace. That may be the answer.
EDIT:
More digging. Heat pump works to 36 degrees. Then as someone says the furnace kicks on when the difference is more than 4 degrees. The floor was warm because the furnace came on in addition to the heat pumps. I did not know it would turn on gas heat automatically from electric heat mode because there is a gas mode as well. It must have been colder than I thought.
I guess all of this automatic stuff is good.
Boat heat pumps use water temps and below 40 degrees they stop making heat. Never been in water that was under 45.