What powers the heated blanket on the AFT potable water tank?

The heated blanket on the AFT potable water tank is powered by an electric system. This type of heating system is efficient and provides a consistent source of heat which is necessary to prevent the water from freezing in low temperatures, ensuring that the potable water remains usable during flight. Electric systems are commonly used in aviation for various applications due to their reliability and ease of control.

While hydraulic systems and pneumatic systems are utilized in aircraft for different functions, such as operating landing gear or flight control surfaces, they are not suitable for providing heat. Battery backup would be more relevant for emergency power situations rather than for continuous heating applications like those needed for a heated blanket. Thus, the right choice reflects the standard practice in aircraft heating systems, which predominantly relies on electrical power for operational components like the heating blanket.