Want to travel in your own yellow submarine? The owners of 42 metre Sofia, Moonen’s largest yacht yet, sure did. The yacht’s owner is an avid diver, so the addition of the sub was a welcome toy to Sofia’s arsenal. The submarine-carrying Moonen yacht was specifically designed around the two-person submersible – a C-Quester 3 from the Dutch firm U-Boat Worx. The stern platform had to be lengthened to carry the sub on the transom and weight was redistributed forward to accommodate the added weight. Designed by Rene van der Velden, this elegant explorer yacht offers luxe accommodations and the bonus option to dive deep thanks to the sub.