Princess Yachts Princess Yachts International’s Head Office is based at Newport Street, Plymouth, alongside waterfront factories; in addition it has four other production sites in the Plymouth area, totaling around 870,000 sq ft (80,910 sq m). Celebrating its 40th Birthday in 2005, Princess Yachts International is recognized as one of the world leaders in production yacht and boat building. Princess produced its first yacht in 1965, and continues the today with two primary ranges of yachts: flybridge and sport express cruisers. The flybridge yachts range from 44 feet to 84 feet in length, while the express line ranges from 43 feet to 66 feet. Each year, Princess continues to upgrade and update their yacht building facilities, with equipment such as state-of-the-art CAD systems. Princess maintains quality control by designing, engineering and producing components in-house. In addition, Princess yachts typically undergo sea trials in the English Channel to prove their sea worthiness. ***