Stone makes sure she's steady, then... jumps off the boat into the water. He can't jump high enough to get air here without hitting the ferry with his wings, so he shifts underwater, and swims swiftly towards the surface a little ways out, getting enough momentum to surge out of the water and into flight. It's harder, these days, with his wings being a lot more heavy-feeling than they used to be, with his lungs not at full capacity, but dammit, he's practice this maneuver enough that he's still going to do it.

Then he circles overhead twice to let the water sluce off him and for Elle to get ready, and swoops down to snatch her up off her box tower in one hand. Claws carefully sheathed, so nobody gets scratched.