S-130 Radio Communication 2 — Questions and Answers
Question 1: When a firefighter needs to relay an urgent safety message on a crowded radio channel, what is the correct procedure?
- Wait for a break in traffic, then transmit normally
- Transmit 'EMERGENCY TRAFFIC' three times to clear the channel (Correct answer)
- Switch to a backup frequency and repeat the message
- Contact dispatch by cell phone instead
Correct answer: Transmit 'EMERGENCY TRAFFIC' three times to clear the channel
Transmitting 'EMERGENCY TRAFFIC' three times clears the channel and signals all units to stand by for a priority message.
Question 2: What does the term 'radio dead zone' refer to in wildland firefighting operations?
- A time period when radio use is prohibited
- A geographic area where radio signals cannot reliably reach (Correct answer)
- A frequency that has been decommissioned
- A channel reserved for emergency use only
Correct answer: A geographic area where radio signals cannot reliably reach
A radio dead zone is a geographic area where terrain or distance prevents reliable radio communication.
Question 3: Which phonetic alphabet letter is used to represent the letter 'F' in ICS radio communications?
- Foxtrot (Correct answer)
- Frank
- Felix
- Freddy
Correct answer: Foxtrot
In the NATO phonetic alphabet used by ICS, 'F' is represented by 'Foxtrot.'
Question 4: A crew supervisor needs to report a spot fire location. Which format is most appropriate for radio communication?
- Describe it in full sentences with detailed narrative
- Use brief, clear terms: location, size, and direction of spread (Correct answer)
- Only report when the spot fire exceeds one acre
- Wait until returning to camp to make a written report
Correct answer: Use brief, clear terms: location, size, and direction of spread
Concise reporting with location, size, and spread direction ensures rapid understanding and response.
Question 5: What should a firefighter do if they transmit a message and receive no acknowledgment?
- Assume the message was received and continue working
- Wait 30 seconds and retransmit the message (Correct answer)
- Immediately escalate to an emergency channel
- Change radio batteries and retransmit
Correct answer: Wait 30 seconds and retransmit the message
Waiting briefly and retransmitting ensures the original failure was not due to momentary interference.
Question 6: In ICS, which position is primarily responsible for managing all radio communications on an incident?
- Incident Commander
- Communications Unit Leader (COML) (Correct answer)
- Operations Section Chief
- Safety Officer
Correct answer: Communications Unit Leader (COML)
The Communications Unit Leader (COML) is responsible for planning, implementing, and managing incident communications.
Question 7: Why should firefighters avoid using 10-codes on wildland fire incidents?
- 10-codes are only approved for law enforcement use
- They can be misunderstood when multiple agencies work together (Correct answer)
- 10-codes require special FCC licensing to use
- They consume more airtime than plain language
Correct answer: They can be misunderstood when multiple agencies work together
Plain language is mandated on wildland fires because 10-codes vary by agency and can cause dangerous miscommunication.
S-130 Radio Communication 2
When a firefighter needs to relay an urgent safety message on a crowded radio channel, what is the correct procedure?