Viking, a Canadian company that has been building brand-new Twin Otters for a few years now, this week introduced a new variation, the 400S Seaplane, at the Singapore Airshow. While the twin was previously available with optional floats, the 400S is optimized for water-based operations, with corrosion-resistant packages for the airframe, powerplant and fuel system. Other features include additional draining and sealing, and corrosion-resistant materials throughout the aircraft.
Source: avwebViking Debuts Twin Otter Seaplane At Singapore