Stepping into the small maritime art gallery on Water Street in Stonington, Connecticut, a visitor’s senses are immediately altered by stirring paintings of ships and yachts at sea, some in distress. J-Class yachts are rail down under full sail; a lobster boat battles a frothy rip; and a chilly colonial-era Boston waterfront is packed tightly with merchant ships in winter. Time rolls back and the era of sail, working waterfronts and steam power are once again in full bloom. The J.