Shallow bays and estuaries are no impediment to exploration for cruisers under way on this British-built 42-footer. With its highly developed swing keel lowered, the deep draft of 8 feet 9 inches guarantees weatherly bluewater performance. Then touch a button, and the boat draws a mere 2 feet 7 inches for thin-water forays. The Southerly 420 is part of Cruising World's 2013 New Boat Showcase.