Launch delayed from June 5. The ICO-2 satellite was launched by British New ICO (formerly ICO Global Communications) to provide mobile communications and data/Internet services at S-band, supporting 4500 simultaneous calls. The Boeing BSS-601M satellite was similar to the standard geostationary 601 model except that it omitted the R-4D apogee engine and associated fuel, and had a larger payload section. Launch mass was 2700 kg; dry mass was around 2200-2400 kg with the remainder being station-keeping fuel. The AC-156 launch vehicle's Centaur stage reached a 167 x 10099 km x 44.6 deg transfer orbit 10 minutes after launch. A second burn 1.5 hours later put ICO-2 into a circular 10,100 km orbit. The first ICO satellite was launched in March 2000 but failed to reach orbit. ICO-2 was used for testing of the ICO system before the remaining satellites would be launched. Unlike the Iridium and Globalstar constellations, ICO proposed to use a small number of large satellites. The ICO fleet, anticipated to consist of 10 satellites, was to enable relay in S- and C-bands of voice and internet communications from/to land and ocean based mobile telephones. With a total power of 5 kW, ICO F2 was to enable a simultaneous capacity in 4,500 channels.