Internal mainsheet halyard, electric self tailing winch with the addition of a brake or clutch. I tie it to the ring on the chair and the Admiral pushes the button for the winch. It's almost impossible to screw up as the clutch is closed so even if she lost the winch wraps the clutch will hold.

I trust her completely on passage so there's no reason not to trust her with my life in this situation.

I tried a safety line but it's just too complicated and problematic on it's own, besides, it's only 60 feet and at 67 There are no safety nets.