That upper right floor plan is the quarter deck. It is the highest part of the boat, with there being no sails to worry about. The quarterdeck is right above the main deck and above the cabin area of that floor, with there being those two small storage areas and the bedroom and stairs to the lower deck.
The lower deck has three bedrooms and the engines to the paddles, which go down into the cargo bay. Since it is powered by a fire elemental, it is quiet enough for keeping yourselves sane. Still, whoever gets the better bedroom on the main deck is going to be funny to figure out.
The cargo bay has the engines and the furnace of the fire elemental, as those are those red squares. The brown squares are the beds of the bedrooms, for easy spotting.