To fly non-stop across the Atlantic Ocean, Concorde required the greatest supersonic range of any aircraft.[123] This was achieved by a combination of engines which were highly efficient at supersonic speeds,[N 6][2] a slender fuselage with high fineness ratio, and a complex wing shape for a high lift-to-drag ratio. This also required carrying only a modest payload and a high fuel capacity, and the aircraft was trimmed with precision to avoid unnecessary drag.[3][4]