Debbie says they expect to start off between 5,000 and 10,000, and that they could go up into the 20,000s if necessary but it would not be for long due to the temperature. They will vary their altitude to find winds blowing in the desired direction, in other words so they can steer.
Their meteorologist, with whom they should be able to maintain contact, will have an important role to play as the flight progresses.
She doesn`t care where they make landfall on the European side of the pond as that`s in the will of the Gods to a degree, but hopes it will be somewhere `interesting`, like Norway perhaps, or the west coast of France, or northern Spain or Portugal.
Their call sign will be Golf - Zulu Oscar Zulu Oscar, they requested that registration some years ago because it looks a bit like 2020 and that was the year they originally planned to do this trip. But along came Covid, and then last year there was a world shortage of helium, so the windows in those years were abandoned, and here we are now in 2023.