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In a book I'm reading, there is a sentence like this:
However, such a long rendezvous is cramped, uncomfortable and not the most efficient use of time for astronauts or Mission Control, and so in August 2012 a new four-orbit rendezvous profile was attempted, using a Progress cargo vehicle.
My question is: what is a four-orbit rendezvous profile? Does it mean that the spacecraft has to complete 4 orbits right before rendezvous with ISS? And so before 2012 it has to completes more orbits?