Клик на название графика включает/выключает его. "-Дельта" - графики скорости изменения, единиц в минуту.
An encounter between a Navy F/A-18 Super Hornet and an unknown object. It was released by the Defense Department's Advanced Aerospace Threat Identification Program. Courtesy of U.S. DEPARTMENT OF DEFENSE. Published - December 16, 2017 НЛО, Официальное Видео Пентагон