We have high freeboard and needed a step up so we built our own. We drilled 1/2" holes an inch in from the corners of a 3' 2X6 and threaded 1/2" line thru, then flipped the whole thing upside down so the rope
comes down around the outside of the board, back up thru a hole, across the width of the board, down and around the outside of the other edge - rope
won't slip that way and the rope pads the hull from the board. The ropes tie to stanchion bases either side of the lifeline gate. It works real well.
I have stepped aboard a boat or two with fender
steps - they work OK, but are not as beefy and stable as my step board invention.