astronaut can simply move the c c 35 to another module where the c c door can be opened safely by the contained astronauts or by an external crewmember 6 there are various scenarios and modes of operation with the c cs 35 depending on the configuration of the ss if necessary the space suited astronaut can move the c c 35 to a crew return vehicle such as a space cruiser 14 and install it for space flight and or recovery 7 there is an ec lss unit stowed in the forward payload bay of the cruiser that can be plugged into the c c 35 as an alternative to the ccec lss attached to the c c 35 this feature provides redundancy and extends the duration of support this stowed ec lss can be a version of the ccec lss the provision can be made for such a back up ec lss with other type vehicles that are different from the cruiser 14 8 the cruiser lifecraft or other crew return vehicle may stand off and return to the ss or can be flown back to earth with the c c s 35 9 the crew return vehicle may be equipped to permit the opening of the c cs 35 within the vehicle 10 a crew return vehicle may be equipped to load and transport the c.