Aha! Me Hearties, when we sailed round the Cape in our square-riggers, we just slung a Bosun's-Chair from one of the yardsSky hook
Actually, its the first time I have been in a place to 'take the ground' since buying her from the builder in late 2016. So I was a little wary. Its also my first twin keel'er, so not even tried before. My previous boats would have fallen over! It sits on the keels and rudder of course, as I guess you knew. The ladder is for getting out of the water. Its a bugger when its on the beach though, like in the photo. We used the dinghy to stand on. Which was needed anyway when the tide was in. Its tied on!
The boom makes a good crane arm. Often a technique used to get a person out of the water and back in the boat. A bit too low for lifting you over the guard wire though L'Hobo
Who said progress was for the best???