Soyuz 37 was the 11th mission to visit the Salyut 6 space station and carried the the EP-7 crew, which visited the long-duration Soyuz 35 resident crew. The mission began on July 23, 1980, 18:33:03 UTC, launching Commander Viktor Gorbatko and Research Cosmonaut Pham Tuân, the first Viatnamese cosmonaut, into orbit. They docked with the station the next day. During their 7-day stay on the station, EP-7 crew carried out some experiments. They also swapped vehicles with the resident station crew, and returned in Soyuz 36 spacecraft. The mission concluded with a safe landing back on Earth on October 11, 1980, 09:49:57 UTC.