Originally Posted by HopCar
Chuck, What's that thing hanging off the swim platform? Some sort of davit?
That's a Roskelley Olsson davit. They are popular in the Pacific NW, and have been sold around the country as well. It is essentially a frame, hinged at the bottom, from which a dinghy hangs off the stern. It is raised and lowered by an electric winch that is mounted to the davit and is cabled to the transom.
The photo was taken on a mooring buoy off Clark Island, (one of the Washington State Parks), and the davit is down because we are off in the dinghy.