Passenger service resumed in 1955 using a rebuilt 1924 Swedish ship, the MS "Gripsholm". Renamed "Berlin", she was the sixth German ship of that name, the fourth at NDL, and sailed North Atlantic routes. In 1959, the company added the "Bremen" (formerly "Pasteur"), and in 1965, the "Europa" (formerly "Kungsholm"), "Gripsholm"'s sister ship bought from the Swedish American Line, with a capacity of 843 passengers. These vessels were first placed in scheduled service to America but soon transferred to cruising. In 1967, the express freighter "Friesenstein" (21.5 knots) inaugurated the Friesenstein class and replaced "Nabob" and "Schwabenstein". Passenger service was running at an increasing deficit, and the rapidly growing container traffic required cost-intensive retooling in the freight business. In 1968 NDL inaugurated container service to the USA with the "Weser-Express"; two more container ships were soon added.