On 8/5/2012 1:51 AM, Brian Gaff wrote:
Now they can resupply in 6 hours, one assumes only if the orbit and pad are
in the correct relationships, it seems that its not that difficult after
all. I'm sure the old reason for not doing this was due to excessive fuel
use to achieve it in relation to the more leisurely way. Was or is this
true, or was it just an excuse?

the old obstacle for doing this was lower iss orbit. the iss orbital
altitude was intentionally reduced to make it reachable by space
shuttle. now, with shuttle out of the picture, the iss was transferred
to a notably higher orbit, making it much easier to shoot progress ships
straight to the iss.