The second of eightIntelsat III satellites to be launched, Intelsat III F-2 was built by TRW. It was a spacecraft, with its mass reducing to by entry into service as it burned propellant to reach its final orbit. The satellite carried an SVM-2apogee motor for propulsion and was equipped with two transponders powered by body-mounted solar cells generating 183 watts of power. It was designed for a five-year service life.