The Princess Yachts S72 is the first model in a new series from the English builder. The S in the model name stands for “sport bridge,” but this vessel is defined by so much more than its flybridge. The 72-foot yacht features an upper deck that offers space for open-air relaxation, and its overall styling and interior design seem to target a younger, more cosmopolitan clientele than Princess’s typical customers. With a top speed of 37 knots and below-deck accommodations for as many as six passengers and two cr…