According to the United States Air Force, the current manual
“warning only” collision systems don’t prevent many of the controlled-flight-into-terrain
accidents. This is partly due to the fact that warning lights or tones don’t
offer any help if the pilot has lost consciousness or has lost their
situational awareness.
To help reduce these accidents, the Air Force recently announced
that it will begin implementing a new
piece of software into some of their advanced fighter jets including the
F-16 Fighting Falcon, F-22 Raptor, and the F-35 Lightning II.
The new software application is called Automatic Ground
Collision Avoidance System, or Auto-GCAS. Auto-GCAS takes into account data
from a number of factors including the aircraft weight, performance, positional
information and digital terrain elevation data to calculate the aircraft’s
relative position to the earth. It then calculates the maneuvers required to
prevent a collision with the ground.
Rather than simply telling the pilot what to do to avoid the
collision, Auto-GCAS actually takes over control of the aircraft and performs
the maneuvers autonomously when the software finds that the aircraft is within
1.5 seconds of the point of no return for collision with the ground and no
action has been taken by the pilot.
“Initially, we put the ( GCAS ) program on aircraft for
flight safety during other tests, but discovered it may have a lot more
importance than for just the prime things we were asked to look into,” said
Mark Skoog, Auto-GCAS test director and chief engineer at NASA. “We realized we
might have a technology that’s very useful and that nobody even considered was
feasible at that point in time.”
Officials said that the technology has so far performed over
2,500 automated recoveries over flat terrain and 700 automated recoveries using
digital terrain. Skoog went on to say, “The main focus of our testing is to
make sure we have a nuisance-free system that isn’t going to come on when an
aggressive pilot doesn’t want it to.”