What does GLOC stand for in aviation?

In aviation, GLOC stands for Gravity Induced Loss of Consciousness. This phenomenon occurs when a pilot experiences high gravitational forces, often during rapid maneuvers, that exceed the body's ability to maintain adequate blood flow to the brain. As the gravitational forces increase, blood is pushed away from the brain, which can lead to a loss of consciousness. This is particularly relevant in high-performance aircraft where pilots may encounter significant G-forces during climbs, turns, or dives.

Understanding GLOC is crucial for pilots, as it emphasizes the importance of recognizing the signs of impending loss of consciousness and implementing countermeasures to prevent it. Training often includes techniques to manage G-forces, such as specific breathing techniques or the use of specialized equipment like G-suits that help maintain blood circulation during high-stress flight conditions.