When are G-suits required for pilots?

G-suits are specifically designed to help pilots counteract the physiological effects of high levels of acceleration, particularly when operating in environments where forces greater than normal gravity (G-forces) are encountered. The primary function of a G-suit is to maintain blood circulation to the brain and vital organs when a pilot experiences rapid acceleration and deceleration, which can lead to loss of consciousness if the body's blood flow is compromised.

When pilots plan to exceed 2Gs, they are entering a range of forces where the risk of G-induced Loss Of Consciousness (GLOC) becomes significantly heightened. A G-suit works by applying pressure to the lower body, helping to prevent blood from pooling in the legs and ensuring that sufficient blood remains in the upper body, including the brain. Thus, wearing a G-suit when expecting to exceed 2Gs is a precautionary measure to maintain pilot health and performance.

The other scenarios do not universally require the use of G-suits. For example, high-altitude flying does not inherently require them unless specific G-forces are anticipated. Training sessions might not involve significant G-forces depending on the exercises. Cold weather may affect a pilot's comfort but does not necessitate the use of a G-suit. Hence