As a ppl who had to use 121.5 for real once when I lost contact with everyone, including fields I was less than 5 miles from, I can only thank the easyjet driver who relayed my loss of contact to Lyon and then to the milatary field who picked up on my call and offered me a service untill we got clear of whatever was interfering with all 3 radios. And no one shouted "your on guard"
