Originally Posted by Timbo
But they are not the ELT's, which do emit an emergency signal once activated, on a VHF radio freq. which is 121.50.

If you own a VHF handheld, you might be able to hear the woo-woo-woo signal it puts out if you are near an airport when somebody tests one.

But not a marine VHF - those are on 156.0 MHz (channel 0, UK coast guard) to 162.025 MHz (channel 88B, AIS)