VHF guard is 121.5 MHz and if you double the frequency to 243.0 MHz you get UHF guard (aka military air distress), sometimes referred to as Air Force common These are similar to Marine VHF Channel 16. I have wondered if VHF guard would be useful during an emergency, now we know.
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These are similar to Marine VHF Channel 16. I have wondered if VHF guard would be useful during an emergency, now we know.
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