 His first flight was only 18 meters at about 1 meter altitude.Sources differ whether his aircraft was controlled.The earliest contemporary source suggesting that it was controlled, a newspaper article from "Hannoverscher Courier" dating 1 August 1907, states that Jatho "has been working on controllable air vehicles for 12 years by now", however a legal document dated 19 November 1902 (an official decline by legal authorities to attend a legal test examination that Jatho had offered to them) appears to describe a design that still lacked a controlling mechanism.