Orbital "C-130"
I'm a little embarrassed by my ignorance of the ATV.
I was aware of it, and knew it was a “space tug” meant for ISS, but somehow placed it in the category of something not so fully realized.
What an amazing spacecraft.
To use an aviation analogy, ATV could be to space lift, what the C-130 Hercules is to military medium cargo lift.
Not the biggest lifter, but the longest lived, most evolved, most adaptable and effective tool in the tool box.
A man rated variant is inevitable.