Tourists and commuters along Norway’s stunning coastline will soon travel aboard “flying” electric ferries—quietly whizzing above the water to their destinations. A Norwegian leader in sustainable transport, Boreal AS, has ordered 20 electric hydrofoil vessels from Candela Technology, with deliveries next year from the Swedish company that will launch the world’s largest electric fleet. ... The P-12’s unique performance comes from computer-controlled hydrofoils—wings mounted beneath the hull—that lift the vessel above the water at speeds above 18 knots. By flying above the waves, drag is drastically reduced, and energy consumption drops by around 80 percent compared with conventional vessels of...