Six to twelve months earlier With the exception of a few rare EVA sorties

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Part 2 Six to twelve months earlier With the exception of a few rare EVA sorties organized in a hurry, the vast majority of them are prepared well in advance. You have to make arrangements with the schedule of incoming flights and the number of astronauts: the agencies don't really like to send their astronauts out if there are only three people in the station, because there are always two people security reasons... and that a single person on the ISS is not enough to manage an EVA outing. Because it's a teamsport! Two astronauts in the spacesuits, but also a person who must manage the airlock, sometimes also the robotic arm to

be piloted from inside the station.

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On the ground too, you need personnel: a CAPCOM, a person who will be in constant contact with

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the astronauts, and a small technical team who will be able to react quickly in the event of a question or concern.