vhf guard frequency

[DCMon]

Yesterday while listening to 6673 hf from San Franciso I heard them ask one plane out over the pacific to contact another on the vhf guard frequency and have them contact SF on 6673 hf. What is the vhf guard freq.? Is it 121.5 am.

[unitcharlie]

Originally Posted by DCMon

Is it 121.5 am.

Yes, and 243.0AM as well...

[CqDx]

121.500 and 243.000 are the standard guard frequenies. Since civilian aircraft only has VHF voice capability, they monitor 121.5 on a regular basis. It is also used in distress and/or lost contact with ATC. All aircraft is encouraged to monitor the guard frequency at any time or when workload permits.

Also, 123.45, 234.5 and 345.6 is another set of frequencies used over the ocean as a "Air to Air" channel, but less formal. Think of them as like a "party line"

[DCMon]

I always know if I need to know something I can come here and ask. All the smart people here will surely know and thank you.

[W9NES]

try 123.45.

[HenryDavid]

...and of course helicopters frequently on 123.025

[W9NES]

Helicopters are on 123.050 and 123.025 Nationwide