When Jin was coming in the Flame, he said that there was a plane coming. Radzinsky asked: What plane? What did he mean with this? The Swan wasn't built yet, so the Plane couldn't seeing from there. From The Arrow, Staff and Tempest you can only seeing the plane from outside. The Lamp Post has nothing to do with this theory. From The Pearl and Orchid, you can only seeing the plane from above the station. By the Looking Glass, you can't see a plane, only hearing things from the outside world. The Hydra and The Flame are different for me.
But what did Radzinsky said: What plane? Did he met Mikhail Bakunin somehow and told him that you can only seeing the plane by the Flame? If I was building that (The Swan), then I why would I built if it there is a plane is coming.