Which one among the following is not included in Fixed Fire Fighting Systems ?

Fixed Fire Fighting Systems (FFFS) are permanent engineering installations built into a structure to provide continuous fire protection. These systems are designed to detect and extinguish fires automatically or via a central control. Common types include:

• Gas Suppression Systems: Use chemical agents or inert gases (like CO2 or FM-200) to extinguish fires by displacing oxygen or cooling.
• Foam-based Systems: Specifically designed for high-risk areas involving flammable liquids (Class B fires).
• Powder-based Systems: Use dry chemical powders to interrupt the fire's chemical reaction (often mislabeled as "Power-based" in some contexts).

A Fire Blanket is a portable and manual safety tool made of fire-resistant material (such as fiberglass) used to smother small, incipient fires. Because it is hand-held and requires manual intervention at the site of the fire rather than being a permanent, piped installation, it is not classified as a fixed fire fighting system.