What is the primary characteristic of semi-portable systems?

The primary characteristic of semi-portable systems is that they can be moved around but are attached to a specific service or supply, which provides a balance between mobility and functionality. They are designed to be relocatable while still having certain fixed connections that enable them to operate effectively when maneuvered. This design allows for flexibility in response to changing circumstances or environments, making them practical for various firefighting scenarios.

In contrast, systems that are always fixed in one location do not offer the mobility necessary for adapting to different situations. Completely mobile systems, on the other hand, can be moved freely without any attachments, which can limit their functionality in certain settings. Non-operational systems do not serve their intended purpose at all, and therefore do not fit the criteria of being semi-portable in the context of active use in firefighting operations.