Salyut 7, the space station, orbited Earth in regime that was un-manned. Unexpectedly it stops responding to signals from the bottom Control. Fall with this channel, the pride of distance industry and science, would not hurt the country's image, but additionally bring upon catastrophe, probably with loss of life. Astronauts need to get delivered into the channel prevent the catastrophe and to get exactly what led to the breakdown. However, no body has docked an uncontrolled object in distance. For the very day this could be the complicated mission in the foundation of the world of navigation.