Great. I think most informed flyers agree that on balance the best frequency to have preselected for an urgent mayday call is 121.5.
It's also very simple compared to changing frequencies all the time as the flight progresses .
As more aircraft monitor this frequency-even if just on the second or third radio - it will become even more effective. Now we somehow have to get AMSA to expand on their recommendation.
Remember not to use as a chatter frequency. Not needed as you can see its working because airline pilots constantly accidentally call on this frequency when calling centre due to a mic selector error!
No wonder I don't like a CTAF system without a Unicom where "calling in the blind" relies on pilots transmitting on the correct frequency. Even Proffessional Airline pilots constantly make mic selector errors- no doubt us private pilots would make even more.