OzOne wrote
Yep, I understand that.
It's just the turning from alongside into a position 90 degrees to
that in order to slide back into the slip that is a worry.

The whole point of the quesion was to get people to think
outside the box. This is a possible "seaman-like" solution
that a novice would never think of. And who know, it might
just save someone's butt, by posting it here.