Russia is among the world's largest satellite launchers, and has completed the GLONASS satellite navigation system. It is developing its own fifth-generation jet fighter (Sukhoi Su-57), and has built the world's first floating nuclear power plant. Luna-Glob is a Russian Moon exploration programme, with its first mission scheduled to launch in July 2022 (Luna 25). To replace the ageing Soyuz, Roscosmos is also developing the Orel spacecraft, which could conduct its first crewed fight in 2025. In February 2019, it was announced that Russia is intending to conduct its first crewed mission to land on the Moon in 2031. In April 2021, Roscosmos declared that it is planning to quit the ISS, and will create its own space station with the aim of launching it into orbit by 2030. In June 2021, Roscosmos and China National Space Administration announced that they are jointly developing a lunar base, which is planned to be utilized from 2036.