What lesson did the individual learn about fuel management in aviation?

The individual learned that maintaining higher altitudes can lead to fuel savings in aviation. This is due to the aerodynamic benefits and reduced air resistance typically experienced at higher altitudes. When an aircraft flies at higher altitudes, it often encounters thinner air, which reduces drag and allows for more efficient consumption of fuel. Airlines strategically plan flight paths opting for optimal altitudes to maximize fuel efficiency, ensuring that routes are economical while still achieving safety and comfort for passengers. This principle is fundamental in aviation fuel management and fleet operations.