Vostok 6 was the final Vostok flight and was launched two days after Vostok 5 which carried Bykovsky into a five-day mission. The two vessels spent three days in orbital planes 30° apart and, during Tereshkova's first orbit, approached each other to within . Although they were able to communicate via radio, neither could be sure if they saw each other. Cameras placed inside both the spacecraft transmitted live footage that was broadcast on Soviet state television. Tereshkova also maintained a flight log and took photographs of the horizon, which were later used to identify aerosol layers within the atmosphere.