A highly exclusive Linssen Grand Sturdy 500 AC Wheelhouse Long Top, featuring new stabilisers and air conditioning, amongst other things. A very luxurious and fully equipped yacht. The Linssen Grand Sturdy 500 AC Wheelhouse Long Top, a highly luxurious yet seaworthy motor yacht. The popular Linssen Grand Sturdy 500, but with a fixed wheelhouse. A vessel that is anything but standard; everything about it is exceptional and unique. Only three vessels exist in this series.