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The capability of a multifunction display system to present data regarding malfunctioning manned spacecraft systems is illustrated. The development of formats for abnormal operations is based on the correspondence between cognitive requirements of the crewmember and displayed information. Three different stages of cognitive processing are identified and associated spacecraft formats are developed. System architecture provides for the display of required information tailored to crewmember requirements in identifying, understanding, and solving malfunctions via a simple multifunction display interface. Two sets of formats were produced which illustrate traditional display strategies and cognitive representations. Formats were presented to subjects using a slide projector and data were collected to identify any significant differences between the two methods of information display.

A 60-day manned test of a closed-cycle life-support system was completed in a Space Cabin Simulator. Life-support equipment was installed within the chamber and was operated, maintained, and repaired by a 4-man crew. Major objectives of the test included demonstrations of the recovery of potable water from urine and humidity condensate, and the recovery of oxygen from carbon dioxide. Other life-support equipment included a thermal-control subsystem, a two-gas atmosphere control, a trace-contaminant removal subsystem, and a fecal-waste collector that featured vacuum dehydration.