Space-docking is the procedure by which spacecraft connect with other spacecraft in space. This is accomplished by careful manuevering, contact at a slow speed, and the interlocking of latches to secure the craft together. Docking is done with both manned and unmanned spacecraft, the connection allowing transfer of goods or material, or controlled access from one vehicle to the other. (For example, a manned vehicle might dock with a satellite to keep it steady while conducting repairs. Alternately, an astronaut can "spacewalk" away from his vehicle and attach himself to the satellite.)