In the form of a "guest," which was some kind of interstellar ship, it looked most like an ordinary cylinder, but it also had a number of differences from this simple geometric figure. The first such difference was a round growth around the entire section of the hull, located approximately in the middle of its length, but slightly shifted to the stern of the ship. The second and most noticeable difference was the propulsion system, or rather its external element located at the stern of the ship.