Soyuz T-4 was a Soviet crewed space mission launched on March 3, 1981. It was part of the Soyuz program and aimed to transport cosmonauts to the Salyut 7 space station. The mission lasted for 7 days, during which the crew conducted scientific experiments and performed maintenance tasks on the station. The crew of Soyuz T-4 included commander Yuri Malyshev and flight engineer Viktor Savinykh. This mission was significant as it contributed to the ongoing research in microgravity and helped improve the operational capabilities of the Salyut 7 space station, which was crucial for future missions.