Final answer:
Firefighters should wear fire-resistant clothing and use a breathing apparatus while using two-way radios to navigate through smoke and rescue victims, being ready to administer first aid and CPR.
Step-by-step explanation:
When smoke reduces visibility during search operations, firefighters should remain calm and make use of their training and equipment. They need to dress with fire-resistant clothing and carry a breathing apparatus to protect themselves from the smoke and heat. The use of two-way radios is essential to assess fires and situations and report conditions to superiors to receive further instructions. They should navigate cautiously, often feeling their way along walls, and use their sense of touch and hearing to compensate for the lack of visibility. When dealing with victims, firefighters must be prepared to administer first aid and, if required, cardiopulmonary resuscitation (CPR). Training in search and rescue techniques under low visibility conditions is crucial for saving lives while ensuring their own safety.