On arrival, which action supports coordinated efforts by multiple units?

• A. Rely solely on informal signals between crew members.
• B. Establish radio contact, assign roles, set up traffic control, and maintain clear, concise communication.
• C. Wait for a supervisor to speak first.
• D. Begin patient care before communicating with other units.

Answer: (B)

Coordinated multi-unit responses depend on establishing a shared operating picture through clear communication and defined roles. On arrival, the best approach is to establish radio contact with all units, assign specific roles, designate traffic control, and maintain clear, concise communication. This creates a common understanding of who is doing what and how information will flow, which helps prevent misunderstandings, duplication of effort, and delays. It also helps manage scene safety and resource sharing, so patient care and scene operations proceed in an organized, efficient manner.

Relying solely on informal signals can lead to miscommunication and missed actions. Waiting for a supervisor to speak first introduces unnecessary delay, slowing the response. Beginning patient care without coordinating with other units can disrupt overall scene management and traffic safety.