Well here’s an interesting idea. Instead of having the cabins on the lower deck, where they rub shoulders with the machinery space and water laps incessantly against the hull, why not put them on the middle deck?

That is exactly what Cetera has done with the 60, a ‘multispace yacht’ which its designer Francesco Guida claims has around 30 square metres more living space than a traditional 60-footer.
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https://www.mby.com/news/cetera-60-design-cabins-main-deck-112211