Due to unstable temperature, disparity between the frequencies of the transmitters and receivers, which were stabilised by special quartz resonators, occurred.

While welding, Kubasov almost burned through the hull of the vehicle's Living Compartment, which in the absence of spacesuits could have resulted in a catastrophic situation.

The radio call sign of the spacecraft was Antey, referring to the Greek hero Antaeus, but at the time of the flight, however, it was also the name of the largest practicable aircraft, the Soviet Antonov An-22, made in Ukraine.

The mission objectives included:[2] Stable two-way radio communications was maintained between the spaceships and the ground stations, and TV coverage was broadcast from the ships during flight.

The most significant objective was testing alternate methods for welding using remote handling equipment in the high vacuum and weightless conditions of outer space.