What is a key requirement for hangar protection?

A key requirement for hangar protection is the installation of a low-level AFFF (Aqueous Film Forming Foam) system with low-profile nozzles. This system is specifically designed to combat flammable liquid fires, which are a significant risk in aviation environments where aircraft and fuel are present. The low-profile nozzles help to ensure that the foam can effectively cover the fuel surface, preventing re-ignition and suppressing the flames.

AFFF systems are advantageous in hangars because they create a cohesive film over the fuel, allowing for a rapid extinguishing effect. In aviation settings, where quick responses to fire threats are crucial, having a dedicated system that can respond immediately to hazards is vital for safety and damage mitigation.

In contrast, the other options do not adequately address the specific needs of aircraft hangar environments. A high-level water spray system, while useful in some applications, may not be as effective as AFFF in suppressing flammable liquid fires. A manual fire suppression system relies on human intervention, which may not be as quick or effective in emergency situations when every second counts. Lastly, indicating that no fire protection is required is not only unrealistic but also a serious safety oversight, as hangars are inherently high-risk areas for