14.1.2 General EVA Design ConsiderationsĮVA can provide an effective means for service, maintenance, repair, or replacement of space equipment without the need to remove it to a pressurized environment, return it to Earth or abandon it.Ī. This includes any internal activities where a pressure-suited crewmember may be operating in normal modes of operation (e.g., airlocks, passageways, unpressurized work areas, donning/doffing areas) and abnormal modes of operation (e.g., unpressurized modules). EVA begins with depressurization of the airlock or space module, and ends with repressurization of the space module or airlock after crewmember ingress. EVA is any activity performed by a pressure-suited crewmember in unpressurized or space environments. This section establishes guidelines for Extravehicular Activity (EVA). 14.1.1 General EVA Information Introduction Volume I, Section 14 14 EXTRAVEHICULAR ACTIVITY (EVA)
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