Cats aren't that heavy, just put some ramps or rollers on one end. Sail up next to the platform and hop off, pull the bows to the ramp/rollers and drag the cat up. If you're in a tidal zone you will have to let the dock move around some. The real reason this platform will move around less is because it's so much heavier than a cat. Hope you've got another method of getting back to shore because it would be an annoying swim after a long tiring day of sailing.