The very top of the wire drawing represents the only part of the ocean landscape that can be seen on the surface of the water: It is Bouvet Island, one of the most isolated islands in the world.
VOA: special.2009.05.06
It had two styli connected to pendulums joined to a wire and could reproduce writing on an electrically conductive surface.
Instead of jamming electrons through wire, generators convert them to microwave signals and fling these along the surface of the earth, between a system of relays spaced about 20 or 30 miles apart.