Which of the following is NOT a common installation type for CCTV cameras?

The classification of installation types for CCTV cameras typically includes various settings where the cameras are deployed, such as indoor, outdoor, and covert installations. Indoor cameras are placed within a building to monitor activities or areas inside, while outdoor cameras are designed to withstand environmental conditions and are positioned outside to surveil external spaces. Covert cameras, on the other hand, are intentionally hidden or disguised to capture footage without drawing attention, often used for security in sensitive environments.

The term "vertical" does not represent a recognized type of CCTV installation. While the position or orientation of cameras can vary and could potentially be referred to as vertical in certain contexts, it does not describe a specific, common installation type. Therefore, it stands out as the option that does not fit within the standard classifications used in CCTV systems. This understanding clarifies why vertical is not typically categorized alongside the other types of installations.