S-130 Radio Communication 5 — Questions and Answers
Question 1: When establishing communication with a new radio system on an incident, what should a firefighter do before their first transmission?
- Transmit a long test message to check clarity
- Perform a radio check to confirm the channel is working and readable (Correct answer)
- Wait for dispatch to contact them first
- Set the volume to maximum before transmitting
Correct answer: Perform a radio check to confirm the channel is working and readable
Performing a radio check confirms the system is functioning and the signal is clear before operational messages are transmitted.
Question 2: A spot fire is reported downhill and to the east of Division A. How should this be communicated over the radio?
- 'We have a problem over here, come check it out'
- 'Division A to Operations: spot fire approximately 200 yards downhill and east of our position, approximately 0.1 acres' (Correct answer)
- 'There's a spot fire, sending coordinates by text'
- 'Operations, standby for a spot fire update at the next briefing'
Correct answer: 'Division A to Operations: spot fire approximately 200 yards downhill and east of our position, approximately 0.1 acres'
Effective spot fire reporting includes the caller's identity, location relative to known landmarks, estimated size, and urgency.
Question 3: What does 'talk-around' mode mean in the context of portable radios on a wildland fire?
- Communicating through a repeater system
- Direct radio-to-radio communication without using a repeater (Correct answer)
- Switching to a command frequency to bypass tactical traffic
- Using a cell phone when radio communication fails
Correct answer: Direct radio-to-radio communication without using a repeater
Talk-around (also called direct or simplex mode) allows radios to communicate directly without a repeater, useful for short-range local coordination.
Question 4: Which of the following best describes the 'read back' technique in radio communication?
- The receiving unit reads the message aloud while writing it down
- The receiving unit repeats the message back to the sender to confirm accuracy (Correct answer)
- The sending unit repeats the message twice to ensure it is heard
- Dispatch records and reads back all messages at end of shift
Correct answer: The receiving unit repeats the message back to the sender to confirm accuracy
The 'read back' technique requires the receiver to repeat critical messages so the sender can confirm the information was received correctly.
Question 5: During rapidly changing fire conditions, which radio practice is most critical to firefighter safety?
- Limiting all radio communications to scheduled check-in times
- Providing immediate, real-time updates on fire behavior and crew location (Correct answer)
- Waiting for confirmation from all supervisors before transmitting
- Reducing radio traffic to conserve battery power during the peak period
Correct answer: Providing immediate, real-time updates on fire behavior and crew location
Real-time updates on changing conditions allow supervisors and crews to respond immediately to threats rather than reacting after the fact.
Question 6: What is the significance of the ICS position 'Communications Unit Leader' having a copy of the current Incident Action Plan (IAP)?
- They use the IAP to determine radio equipment purchasing budgets
- The IAP contains the ICS-205, which outlines radio assignments the COML must implement (Correct answer)
- The COML writes the IAP and needs it for editing purposes
- The IAP is required by FCC regulations for all incident radio operators
Correct answer: The IAP contains the ICS-205, which outlines radio assignments the COML must implement
The IAP includes the ICS-205 Communications Plan, which the COML uses to set up and manage radio assignments for the operational period.
Question 7: A firefighter hears a MAYDAY transmission on their radio. What is the correct immediate response?
- Continue current task and report the MAYDAY at the next briefing
- Clear the channel immediately and allow emergency traffic to proceed (Correct answer)
- Transmit their own location to help triangulate the distress signal
- Switch to the command channel and wait for further instructions
Correct answer: Clear the channel immediately and allow emergency traffic to proceed
Upon hearing a MAYDAY, all non-emergency users must immediately stop transmitting and keep the channel clear for emergency communications.
S-130 Radio Communication 5
When establishing communication with a new radio system on an incident, what should a firefighter do before their first transmission?