Which item must be carried by personnel when staging calls in high-rise operations?

When staging calls in high-rise operations, personnel must carry portable radios. These communication devices are essential for maintaining constant contact with the command center and other units on the scene. Given the vertical nature of high-rise buildings and the potential for a chaotic environment, having reliable communication is crucial for coordinating efforts, ensuring everyone's safety, and receiving updates or directives.

In high-rise operations, the challenges of navigating tall structures and the distance between teams make effective communication a top priority. While other items like fire axes, thermal imaging cameras, and water bottles may also be important for specific tasks or personal needs, they do not serve the fundamental purpose of facilitating communication in high-pressure situations. Portable radios are critical for the safety and efficiency of the operation, ensuring that all personnel can respond promptly to changing conditions and directives.