I try to imagine aerial refueling of an airplane (I've never done it), and then add in -

the counter-intuitive effects of orbital changes, plus

the lack of a built-in orientation to the object with which one is docking.

Seems daunting, though it looks, too, as if one could learn a lot from a computer game type simulation. With enough time. And enough skill.

Ten or 12 years ago my neighbor purchased a model, remote-control helicopter. It came with a computer program to train him. He had an Apple, and the graphics were primitive - a "stick" helicopter. The program functioned well enough, responded about as fast as the helicopter would have.

He was a current fixed-wing pilot, and I had been, was no longer current. We would run that damned program by the hour. And we crashed the damned helicopter by the hour.

He finally hovered the real model once, then sold it. I never did try to fly it.

Neither of us had either the time or the skill to get to where we felt at all confident, even with the program. That may have been the value of the program. We didn't wreck the model.

I know with more skilled people and more time it can be done. I hope they have fun.

Arf