What is a section of a ladder that can be extended to gain height and distance called?

The section of a ladder that can be extended to gain height and distance is known as the fly. This component is designed to slide out from the main body of the ladder, allowing firefighters to achieve the necessary elevation to access higher areas, such as rooftops or upper floors of buildings. The operation of the fly section typically involves a system of pulleys or a telescoping mechanism, which enables a smooth extension and retraction process. This feature is crucial in emergency situations where rapid access is required and versatility in reaching various heights is essential for safety and effectiveness during firefighting operations.