Which system provides defogging capabilities to the canopy?

The environmental control system is responsible for managing various aspects of the environment within an aircraft, including temperature, pressure, and humidity levels. One of its critical functions is to provide defogging capabilities to the canopy, ensuring that visibility for the pilot is maintained under different atmospheric conditions. This is particularly important during flight operations when moisture can condense on the canopy and obstruct the pilot's view.

The environmental control system typically employs mechanisms such as heating and airflow to prevent condensation from forming on the canopy surface. By regulating the airflow inside the cockpit and directing warm, dry air across the canopy, the system effectively keeps the glass clear, enhancing safety and operational effectiveness.

Other systems like the hydraulic system, fuel system, and electrical system serve distinct functions that do not pertain to maintaining visibility through the canopy. The hydraulic system primarily operates mechanical systems such as landing gear and flight control surfaces. The fuel system is focused on the storage and supply of fuel to the engine, while the electrical system is responsible for powering the aircraft's electronic components and systems. Thus, these systems do not contribute to the de-fogging capability of the canopy.