The Vostok and Voskhod spacecraft had served the Soviet space programme well, but as plans advanced beyond the limitations of these craft for future projects, including manned lunar flights, it meant that a whole new generation of spacecraft would have to be designed and flown. Vostok and its improvised variant Voskhod lacked the capacity for achieving rendezvous and docking, but the new craft—christened Soyuz—would not only serve the Soviet Union well, but almost four decades on it continues to fly into space, albeit greatly modified.