The design shown is quite incomplete and impractical. Accommodation ladders have been around for many years and this one doesn't make the grade. Most have a platform that hinges so that it easily folds up against the lifelines
to get underway. The platform itself usually has a circular section connected to the rectangular part that swivels so that the entire ladder can be swung out to land on a pier, dock
, or float. The steps are normally supported by two rails such that they always stay horizontal regardless of how high or low the lower platform is positioned depending on the height of the float or pier. The lower platform also normally has wheels or rollers to let it move on a dock
or pier. There need to be fenders on the inboard part of the ladder and platform to prevent damage to the yachts hull if a boat
slams into it in bad weather
. There should be vertical rub rails on the outside face to prevent a boat from over riding the lower platform in waves, causing damage and injury... and on, and on, and on.
It just doesn't make it, but that doesn't mean that accommodation ladders for yachts is a bad idea, because it isn't, and it would definitely appeal to larger yachts. That is if it were made right.