What is a key benefit of the flat load when used for preconnected attack lines?

The flat load is designed specifically to facilitate quick deployment of preconnected attack lines during emergency situations. This loading method organizes the hose in a manner that enables firefighters to rapidly uncoil and extend the hose without having to untwist or untangle it. The flat configuration allows for easy handling and efficient management as firefighters can quickly grab and deploy lengths of hose as needed, making it vital for swift responses to fires.

If the hose were loaded in a more complex manner, it could delay the critical moments of getting water on the fire. Similarly, while considering weight and storage space, those factors aren't the primary advantages of the flat load; instead, its main purpose is maximizing readiness and operational efficiency on the scene.