Somatogravic illusion (SGI) is a stealthy killer. It reveals itself in seemingly unrelated ways and can sneak up and kill you before you know what happened.
Here are some different accident types in which SGI apparently reared its ugly head:
How Somatogravic Illusion Kills Pilots
Deadly deception reveals itself in seemingly unrelated ways and can sneak up before you know what happened.
Key Takeaways:
- Somatogravic illusion (SGI) is a dangerous sensory misperception where rapid aircraft acceleration is falsely felt as a nose-up pitch, causing pilots to mistakenly push the aircraft's nose down.
- SGI is a significant factor in fatal aviation accidents, primarily occurring during takeoffs in dark night or low-visibility conditions and the initial acceleration phase of a missed approach, due to the lack of external visual references.
- The illusion stems from the inner ear's inability to differentiate between actual pitch-up and forward acceleration without visual cues, leading to misinterpretation of physical sensations.
- Pilots must prevent SGI-related accidents by strictly trusting and referencing flight instruments (attitude indicator, VSI) to verify and maintain the correct pitch and a positive climb rate, ignoring deceptive bodily sensations.
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