Not looking for wheel chair access here. Boat, Catalina 25, is too small to begin with. My dad recently sold his boat simply due to boarding issues with his cabin cruiser on the water. I've even seen him fall deboarding a pontoon on a lift up in the Minnesota lakes. Boarding a sailboat would be even more of a challenge. Unless the process is somehow made easy, he's not likely to board a small boat ever again beyond his pontoon.
Not such a simple quick yes or no question after all?
(There are other Forums where you would have been dealt with, much less gently than here, so far.)
_Installing a Powerboat-intended "Boat Lift" for an old Catalina 25, that is worth less than the installation cost, is flighty and foolish and myopic._
My Dad, who spent decades spreading Marine Insurance from an office, just needed a firm hand under elbow to finally go Sailing with me, on my first real Big Boat.
He wore a jogging outfit just in case, and yet he didn't get seasick. We went together to Sea, at last. (Around the Farallones! Dad arranged a "Held Covered" for that one trip.)
I think that you may be grasping for a Technology Solution for something problematical a bit closer to home.
But what do I actually know?