What does the cable system of an aerial device extend?

The cable system of an aerial device is designed to extend the third, fourth, and fifth sections of the device, allowing for greater reach and maneuverability during operations. This extension facilitates the positioning of the aerial device to achieve elevated work, particularly in firefighting, rescue, or maintenance scenarios. The cable system operates by providing the necessary support and mechanical advantage to articulate these sections effectively.

In contrast, extending ladders at a severe angle would not utilize the cable system specifically. The base section of the ladder remains fixed and does not extend on its own through the cable system, and while stability is essential for safe operation, it is not directly affected by the cable system itself. The focus of this question is on the mechanism of extension provided by the cable system, which specifically pertains to the upper sections of the aerial device.