Final answer:
While the question does not have a clear answer from the given options and provided references, communication devices are critical for firefighters during operations, including tactical ventilation.
Step-by-step explanation:
The correct answer to the question "Tactical ventilation roof crew members should have a minimum of" is not provided explicitly in the available options. However, one crucial piece of equipment for firefighters dealing with tactical ventilation on a roof or otherwise is indeed communication devices. Based on the information provided, we can extrapolate that communication is vital. It allows firefighters to assess fires and situations, report conditions to superiors, coordinate within the team, and increase efficiency and safety during a critical event such as a building fire. Portable radios have been a significant advancement thanks to aerospace technology and are used widely in the field. While the question may imply that training is essential, which it undoubtedly is, specific minimum hourly requirements for tactical ventilation are not indicated in the references provided.