the purpose is to return to the habitats formed by the Eagles (a string of rotating stations in areostationary orbit), this is to say, to undertake the trips that have become « routine », once the Eagles’ collar is in place. Departure from the surface of Mars for Earth and not from Deimos, will happen only at the end of the very first sojourns in the Martian world, before the Deimos-II station is built and anchored in the soil of Deimos.