Human spaceflight is distinguished from spaceflight generally, which entails both crewed and uncrewed spacecraft. The Nortraship vessels were crewed by 27,000 sailors. NASA has conducted many crewed and uncrewed spaceflight programs throughout its history. The fleet was crewed by 28,560 or 27,670 men. Intergalactic travel is hypothetical crewed or uncrewed travel between galaxies. Interstellar travel is crewed or uncrewed travel between stars or planetary systems. Cultures lacking resources to achieve crewed spaceflight are ignored as animals. Autopilot software is used on both crewed and uncrewed aircraft, with varying feature sets. This was the first orbital maneuver made by any crewed spacecraft. A wide variety of crewed and uncrewed spacecraft have supported the station's activities. Overall, the public remains largely supportive of both crewed and uncrewed space exploration. The splashdown happened closer to the recovery ship than any other crewed spacecraft. The fishermen also crewed Cromer's two lifeboats. The ATV would form the basis of a propulsion unit for NASA's new crewed spacecraft. NASA was not alone in studying crewed lunar missions.