Quick Answer
In the USA, the Federal Communications Commission (FCC) designates specific frequency ranges for emergency communications, including two-way radios and amateur radio services. The 29.62 MHz and 121.5 MHz frequency ranges are commonly used for emergency purposes.
Designated Frequency Ranges
In the USA, the FCC designates the 29.62 MHz (225-29.69 MHz) range for the Emergency Position-Indicating Radio Beacon (EPIRB) signal, while the 121.5 MHz range is used by aircraft for emergency beacon signals such as ELTs (Emergency Locator Transmitters). 121.5 MHz is also used for general aviation and military communications.
Signal Radio Distress Call Practices
When sending a distress call via signal radio, follow strict protocols. Start with the international distress signal, “Mayday,” three times, followed by your location and a description of your emergency. Use a clear, audible voice and speak slowly to ensure the message is received clearly. Keep your transmission brief and to the point, limiting it to 30 seconds or less.
Two-Way Radio Distress Call Procedures
When using two-way radios for emergency communications, remember to follow the same protocols as signal radio distress calls. However, use the phrase “Mayday” or “Pan-pan” (less urgent) to signal distress, as two-way radio signals have a shorter range than signal radios. When receiving a distress call, confirm the location and type of emergency before dispatching help.
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