Concurrent with marine industry consolidation on the ship owning, building and supply fronts, increasingly innovative vessels concepts are originating from in-house design teams sitting with the major equipment manufacturers. Single-source supplier is today’s mantra on the commercial and military fronts, with companies such as Wärtsilä leading the way. The company recently published details of an innovative new LNG carrier concept, the Wärtsilä DF-electric propulsion concept for liquefied natural gas (LNG) carriers, bringing together two technologies: electric propulsion and dual-fuel engines. The Wärtsilä DF-electric LNG carrier concept is designed for a single-screw vessel with four cargo tanks and a capacity of about 138,000 cu.