[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3479 : Flight evaluations of several hover control and display combinations for precise blind vertical landings : Rep.presented at the AIAA guidance,navigation and control conf.,Aug.20-22,1990,Portland(Or) / J.A.Schroeder,V.K.Merrick, 1990. - 20 p. - Текст : непосредственный.