I'm not sure what you mean by returning, I don't see why it would be that much different to finding the airlock. Essentially the design is that a suit is attached to the outer hull with the back of the suit opening up directly into the ship. All an astronaut does is climb into the suit, press a button to close the back of it (presumably another tight fitting hatch closes on the inside to prevent a hole) and disconnects: see this picture for a demo. It could be made so that where the suit is stored there are protruding hand holds so that when an astronaut gets back he holds on and slots himself in place.Thanks MikeBH, nice point about the material.I was googling some ideas and I found a technology called suitport. It is in a way that spacesuits are outside the spacecraft and when astronaut wants to don them he goes directly from a room into his suit and drifts away from spacecraft. This concept has some flaws,as the pressure between suit and room are different and what could possibly be the technology for returning to spacecraft. returning must be something like airplane landing,it should be precise and controlled.What you guys think of this idea and how can be the returning system? can he use some sort of electromagnetic things that when astronaut is close enough these systems are activated and park the astronaut autonomously in his place?