Soyuz 30 was the fifth mission to visit the Salyut 6 space station and carried the the EP-3 crew, which visited the long-duration Soyuz 29 resident crew. The mission began on June 27, 1978, 15:27:21 UTC, launching Commander Pyotr Klimuk and Research Engineer MirosÅ‚aw Hermaszewski, the first Polish cosmonaut, into orbit. They docked with the station the next day. During their 7-day stay on the station, crew conducted various scientific and medical experiments.
The mission concluded with a safe landing back on Earth on July 5, 1978, 13:30:20 UTC.