Although they flew, the altimeters did not show the height of the aircraft.

When suddenly a white object comes into view, and ascends up to the height of one of the aircraft, and seems to just miss the aircraft.

A calculation was made, which depends on the speed and altitude of the aircraft, as well as other factors.

A calculation was performed, which depended on the speed and height of the aircraft, and other factors.

He told police that he thought the beam “would not go up to the height of the aircraft.

The crew did not appear to have awareness of the aircraft’s proximity with terrain until impact with terrain was imminent.

He told police that he thought the beam “would not go up to the height of the aircraft.

Nothing indicated that the crew were aware of their proximity to the ice until shortly before impact.

To do this, the pilot must reduce the height of the aircraft to 4000 m, depressurize the cockpit and turn on the ventilation system.

Aircraft equipment which makes use of the reflection of radio waves from the ground to determine the height of the aircraft above the surface.