Columbus 40 Crossover Explorer A new design has surfaced coming from Columbus Yachts showcasing what they call the Columbus 40 Crossover Explorer. The designers are incorporating a trend that is now becoming familiar and regularly used -folding bulwarks on the aft main deck area to make more space-. This mechanism is on display here which is envisioned to be utilized by guests mainly while at anchor or certain ports/marinas. That aft deck has a plunge pool and teaked real estate for sun loungers and two stairs aft lead you down to the swim platform where a transformer is hidden in the platform to allow easy access to the water or even the dock. The aft main deck though can carry a tender up to 8-meters.