What is the procedure for supplying an aerial apparatus using its own pump?

When supplying an aerial apparatus using its own pump, the correct approach is to treat it as relay pumping. This is because the aerial apparatus, equipped with its own pump, can take in water from a pressurized source, such as a hydrant, and then distribute it effectively to the aerial device or to the scene.

Relay pumping is a technique used to move water over distances where the initial source may not be able to supply sufficient pressure or volume. In this scenario, the aerial's own pump serves a similar function, drawing and pressurizing water, which allows it to send water effectively to where it’s needed.

Understanding this process is crucial for ensuring that the aerial apparatus operates smoothly and fulfills its role in firefighting operations. This choice highlights the efficient use of resources, maintaining adequate water supply under varying operational conditions, and emphasizing the self-sufficient capabilities of the aerial apparatus's pumping mechanism.

The other methods mentioned, such as direct attach or using a dump tank, involve different operational strategies that are not specifically suitable for the context of aerial apparatus supplying itself.