This International Standard defines all generic requirements for manned space flight vehicle/habitat structures and flight crew training or simulation facilities and the related equipment that directly interfaces with manned space system flight crew members. This International Standard covers the field of human factors as they relate to the space environment and space habitats. These man–systems integration requirements are applicable to space system launch, re-entry, on-orbit and extraterrestrial environments. The requirements specified herein are applicable to new manned space flight programmes and projects.